ÿþ<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN"> <html> <head> <meta name='generator' content='ExamView Pro 3.62 [Windows 4.10 (2222)]'> <title>Chapter 12</title> <STYLE TYPE="text/css"> .spacer { line-height:.7em; } .title { font-size:13pt; font-weight:bold; font-family:"Times New Roman", "Times", serif;color:#000000; } .qnumber { font-size:12pt; font-family:"Times New Roman", "Times", serif;color:#000000; text-indent:12pt; text-align:right; } </STYLE> <script language='JavaScript1.1'> <!-- // Copyright (c) 2000 FSCreations, Inc. var listMap = '111111111111'; var qtypeMap = '222222222222'; var ansMap = new Array(12); ansMap[0] = 'D'; ansMap[1] = 'C'; ansMap[2] = 'B'; ansMap[3] = 'A'; ansMap[4] = 'C'; ansMap[5] = 'B'; ansMap[6] = 'B'; ansMap[7] = 'B'; ansMap[8] = 'D'; ansMap[9] = 'C'; ansMap[10] = 'B'; ansMap[11] = 'D'; function GradeIt(f) { var studentName; var numBlank = 0; var numCorrect = 0; var numPossible = 0; var numSubjective = 0; var currentInstruction; var currentNarrative; var scorePercent; var index; var msg; var text; var i; var showNotes = false; var showRef = false; var numQuestions = 12; var numInstructions = 1; var numNarratives = 0; var prefixText = new Array(12); var numberText = new Array(12); var questionText = new Array(12); var answerText = new Array(12); var responseText = new Array(12); var notesText = new Array(12); var refText = new Array(12); var narrativeIndex = new Array(0); var narrativeText = new Array(0); var instructionIndex = new Array(1); var instructionText = new Array(1); var listMap = '111111111111'; var titleString = 'Chapter 12'; var titleStyle = 'font-size:13pt; font-weight:bold; font-family:"Times New Roman", "Times", serif;color:#000000;'; var qnumberStyle = 'font-size:12pt; font-family:"Times New Roman", "Times", serif;color:#000000; text-indent:12pt; text-align:right;'; var defaultStyle = 'font-size:12pt; font-family:"Times New Roman", "Times", serif;color:#000000;'; instructionText[0] = '<div><span style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'><b>Multiple Choice</b></span><span style=\'font-family:"Times New Roman", "Times", serif; ' + 'font-size:10pt; color:#000000\'><br></span></div><div><span style=\'font-family:"Times New Roman", ' + '"Times", serif; font-size:12pt; color:#000000\'><i>Identify the letter of the choice that best ' + 'completes the statement or answers the question.</i></span></div>'; instructionIndex[0] = 0; numberText[0] = '1.'; questionText[0] = '<div><span style=\'font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000\'>A ____ circuit ' + 'maintains a constant load voltage even if the line voltage or load current experience ' + 'changes.</span></div><div style=\'font-size:2pt\'></div><table cellpadding=\'0\' cellspacing=\'0\' width=\'83%\' border=\'0\'><tr valign=\'baseline\'><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>a.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times"; ' + 'font-size:12pt; color:#000000\'>videotex</span></div></td><td><div><span style=\'font-family:"Times New ' + 'Roman", "Times", serif; font-size:12pt; color:#000000\'>c.</span></div></td><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000\'>volatile storage</span></div></td></tr><tr ' + 'valign=\'baseline\'><td><div><span style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>b.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times"; ' + 'font-size:12pt; color:#000000\'>visible light</span></div></td><td><div><span style=\'font-family:"Times ' + 'New Roman", "Times", serif; font-size:12pt; color:#000000\'>d.</span></div></td><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000\'>voltage regulator</span></div></td></tr><tr ' + 'height=\'0\' style=\'border:none\'><td width=\'5%\' style=\'width:18pt; padding:0\'></td><td width=\'46%\' style=\'width:193pt; ' + 'padding:0\'></td><td width=\'4%\' style=\'width:18pt; padding:0\'></td><td width=\'45%\' style=\'width:193pt; ' + 'padding:0\'></td></tr></table>'; answerText[0] = '<div class=\'default\'>D</div>'; numberText[1] = '2.'; questionText[1] = '<div><span style=\'font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000\'>If percent ' + 'line regulation = 100 </span><span style=\'font-family:"Symbol"; font-size:12pt; ' + 'color:#000000\'>&#180;</span><span style=\'font-family:"Times New Roman", "Times"; font-size:12pt; ' + 'color:#000000\'> (v<sub>REG(max)</sub> - v<sub>REG(min)</sub>)/(v<sub>LINE(max)</sub> - ' + 'v<sub>LINE(min)</sub>) and v<sub>REG(max)</sub> = 12.1 v, v<sub>REG(min)</sub> = 11.9 v, ' + 'v<sub>LINE(max) </sub>= 120 V, and v<sub>LINE(min)</sub> = 110V, then the percent line regulation ' + '=</span></div><div style=\'font-size:2pt\'></div><table cellpadding=\'0\' cellspacing=\'0\' width=\'83%\' border=\'0\'><tr valign=\'baseline\'><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>a.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times"; ' + 'font-size:12pt; color:#000000\'>0.5 %</span></div></td><td><div><span style=\'font-family:"Times New ' + 'Roman", "Times", serif; font-size:12pt; color:#000000\'>c.</span></div></td><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times"; font-size:12pt; ' + 'color:#000000\'>2%</span></div></td></tr><tr valign=\'baseline\'><td><div><span style=\'font-family:"Times ' + 'New Roman", "Times", serif; font-size:12pt; color:#000000\'>b.</span></div></td><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times"; font-size:12pt; ' + 'color:#000000\'>1%</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times", serif; ' + 'font-size:12pt; color:#000000\'>d.</span></div></td><td><div><span style=\'font-family:"Times New Roman", ' + '"Times"; font-size:12pt; color:#000000\'>20%</span></div></td></tr><tr height=\'0\' style=\'border:none\'><td width=\'5%\' style=\'width:18pt; ' + 'padding:0\'></td><td width=\'46%\' style=\'width:193pt; padding:0\'></td><td width=\'4%\' style=\'width:18pt; ' + 'padding:0\'></td><td width=\'45%\' style=\'width:193pt; padding:0\'></td></tr></table>'; answerText[1] = '<div class=\'default\'>C</div>'; numberText[2] = '3.'; questionText[2] = '<div><span style=\'font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000\'>____ describes ' + 'a voltage regulator\'s ability to maintain a constant voltage when the load current ' + 'changes.</span></div><div style=\'font-size:2pt\'></div><table cellpadding=\'0\' cellspacing=\'0\' width=\'83%\' border=\'0\'><tr valign=\'baseline\'><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>a.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times"; ' + 'font-size:12pt; color:#000000\'>Line regulation</span></div></td><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>c.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times"; ' + 'font-size:12pt; color:#000000\'>Light registration</span></div></td></tr><tr ' + 'valign=\'baseline\'><td><div><span style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>b.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times"; ' + 'font-size:12pt; color:#000000\'>Load regulation</span></div></td><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>d.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times"; ' + 'font-size:12pt; color:#000000\'>Local exchange</span></div></td></tr><tr height=\'0\' style=\'border:none\'><td width=\'5%\' style=\'width:18pt; ' + 'padding:0\'></td><td width=\'46%\' style=\'width:193pt; padding:0\'></td><td width=\'4%\' style=\'width:18pt; ' + 'padding:0\'></td><td width=\'45%\' style=\'width:193pt; padding:0\'></td></tr></table>'; answerText[2] = '<div class=\'default\'>B</div>'; numberText[3] = '4.'; questionText[3] = '<div><span style=\'font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000\'>If a stable ' + 'reference voltage is connected on the noninverting input of a noninverting amplifier and a feedback ' + 'path is provided on the inverting input of that op amp, a corrective action happens so quickly that ' + 'the feedback voltage is compared against that reference voltage and a corrective action is sent to ' + 'the transistor. This op amp is sometimes called a/an ____ amplifier.</span></div><div ' + 'style=\'font-size:2pt\'></div><table cellpadding=\'0\' cellspacing=\'0\' width=\'83%\' border=\'0\'><tr valign=\'baseline\'><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>a.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times"; ' + 'font-size:12pt; color:#000000\'>error</span></div></td><td><div><span style=\'font-family:"Times New ' + 'Roman", "Times", serif; font-size:12pt; color:#000000\'>c.</span></div></td><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times"; font-size:12pt; ' + 'color:#000000\'>current</span></div></td></tr><tr valign=\'baseline\'><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>b.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times"; ' + 'font-size:12pt; color:#000000\'>logarithmic</span></div></td><td><div><span style=\'font-family:"Times ' + 'New Roman", "Times", serif; font-size:12pt; color:#000000\'>d.</span></div></td><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times"; font-size:12pt; ' + 'color:#000000\'>exponential</span></div></td></tr><tr height=\'0\' style=\'border:none\'><td width=\'5%\' style=\'width:18pt; ' + 'padding:0\'></td><td width=\'46%\' style=\'width:193pt; padding:0\'></td><td width=\'4%\' style=\'width:18pt; ' + 'padding:0\'></td><td width=\'45%\' style=\'width:193pt; padding:0\'></td></tr></table>'; answerText[3] = '<div class=\'default\'>A</div>'; numberText[4] = '5.'; questionText[4] = '<div><span style=\'font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000\'>If v<sub>o</sub> ' + '= v<sub>REG</sub>((r<sub>2</sub>/r<sub>1</sub>) + 1) and v<sub>REG</sub> = 1.1 V, r<sub>2</sub> = 6.8 ' + '</span><span style=\'font-family:"Symbol"; font-size:12pt; color:#000000\'>W, </span><span ' + 'style=\'font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000\'>and r<sub>1</sub> = 560 ' + '</span><span style=\'font-family:"Symbol"; font-size:12pt; color:#000000\'>W</span><span ' + 'style=\'font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000\'>, then v<sub>o</sub> ' + '=</span></div><div style=\'font-size:2pt\'></div><table cellpadding=\'0\' cellspacing=\'0\' width=\'83%\' border=\'0\'><tr valign=\'baseline\'><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>a.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times"; ' + 'font-size:12pt; color:#000000\'>90.6 mV</span></div></td><td><div><span style=\'font-family:"Times New ' + 'Roman", "Times", serif; font-size:12pt; color:#000000\'>c.</span></div></td><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000\'>14.5 V</span></div></td></tr><tr ' + 'valign=\'baseline\'><td><div><span style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>b.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times"; ' + 'font-size:12pt; color:#000000\'>1.34 V</span></div></td><td><div><span style=\'font-family:"Times New ' + 'Roman", "Times", serif; font-size:12pt; color:#000000\'>d.</span></div></td><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000\'>12.1 V</span></div></td></tr><tr ' + 'height=\'0\' style=\'border:none\'><td width=\'5%\' style=\'width:18pt; padding:0\'></td><td width=\'46%\' style=\'width:193pt; ' + 'padding:0\'></td><td width=\'4%\' style=\'width:18pt; padding:0\'></td><td width=\'45%\' style=\'width:193pt; ' + 'padding:0\'></td></tr></table>'; answerText[4] = '<div class=\'default\'>C</div>'; numberText[5] = '6.'; questionText[5] = '<div><span style=\'font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000\'>A regulator ' + 'circuit that uses +5 V as input and generates a regulated +3.3 V as output is called a step-down ' + 'converter or a ____ regulator.</span></div><div style=\'font-size:2pt\'></div><table cellpadding=\'0\' cellspacing=\'0\' width=\'83%\' border=\'0\'><tr valign=\'baseline\'><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>a.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times"; ' + 'font-size:12pt; color:#000000\'>backward</span></div></td><td><div><span style=\'font-family:"Times New ' + 'Roman", "Times", serif; font-size:12pt; color:#000000\'>c.</span></div></td><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times"; font-size:12pt; ' + 'color:#000000\'>blocked</span></div></td></tr><tr valign=\'baseline\'><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>b.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times"; ' + 'font-size:12pt; color:#000000\'>buck</span></div></td><td><div><span style=\'font-family:"Times New ' + 'Roman", "Times", serif; font-size:12pt; color:#000000\'>d.</span></div></td><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times"; font-size:12pt; ' + 'color:#000000\'>boost</span></div></td></tr><tr height=\'0\' style=\'border:none\'><td width=\'5%\' style=\'width:18pt; ' + 'padding:0\'></td><td width=\'46%\' style=\'width:193pt; padding:0\'></td><td width=\'4%\' style=\'width:18pt; ' + 'padding:0\'></td><td width=\'45%\' style=\'width:193pt; padding:0\'></td></tr></table>'; answerText[5] = '<div class=\'default\'>B</div>'; numberText[6] = '7.'; questionText[6] = '<div><span style=\'font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000\'>A switching ' + 'regulator whose output voltage is higher than the input voltage is called a step-up converter or a ' + '____ regulator.</span></div><div style=\'font-size:2pt\'></div><table cellpadding=\'0\' cellspacing=\'0\' width=\'83%\' border=\'0\'><tr valign=\'baseline\'><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>a.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times"; ' + 'font-size:12pt; color:#000000\'>backward</span></div></td><td><div><span style=\'font-family:"Times New ' + 'Roman", "Times", serif; font-size:12pt; color:#000000\'>c.</span></div></td><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times"; font-size:12pt; ' + 'color:#000000\'>blocked</span></div></td></tr><tr valign=\'baseline\'><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>b.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times"; ' + 'font-size:12pt; color:#000000\'>boost</span></div></td><td><div><span style=\'font-family:"Times New ' + 'Roman", "Times", serif; font-size:12pt; color:#000000\'>d.</span></div></td><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times"; font-size:12pt; ' + 'color:#000000\'>buck</span></div></td></tr><tr height=\'0\' style=\'border:none\'><td width=\'5%\' style=\'width:18pt; ' + 'padding:0\'></td><td width=\'46%\' style=\'width:193pt; padding:0\'></td><td width=\'4%\' style=\'width:18pt; ' + 'padding:0\'></td><td width=\'45%\' style=\'width:193pt; padding:0\'></td></tr></table>'; answerText[6] = '<div class=\'default\'>B</div>'; numberText[7] = '8.'; questionText[7] = '<div><span style=\'font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000\'>A switching ' + 'voltage regulator circuit can be operated in the ____ modulation mode where the duty cycle of the ' + 'current waveform is constant and the frequency is then varied to control the actual output ' + 'voltage.</span></div><div style=\'font-size:2pt\'></div><table cellpadding=\'0\' cellspacing=\'0\' width=\'83%\' border=\'0\'><tr valign=\'baseline\'><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>a.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times"; ' + 'font-size:12pt; color:#000000\'>pulse width</span></div></td><td><div><span style=\'font-family:"Times ' + 'New Roman", "Times", serif; font-size:12pt; color:#000000\'>c.</span></div></td><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times"; font-size:12pt; ' + 'color:#000000\'>dispersion</span></div></td></tr><tr valign=\'baseline\'><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>b.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times"; ' + 'font-size:12pt; color:#000000\'>pulse frequency</span></div></td><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>d.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times"; ' + 'font-size:12pt; color:#000000\'>duplex</span></div></td></tr><tr height=\'0\' style=\'border:none\'><td width=\'5%\' style=\'width:18pt; ' + 'padding:0\'></td><td width=\'46%\' style=\'width:193pt; padding:0\'></td><td width=\'4%\' style=\'width:18pt; ' + 'padding:0\'></td><td width=\'45%\' style=\'width:193pt; padding:0\'></td></tr></table>'; answerText[7] = '<div class=\'default\'>B</div>'; numberText[8] = '9.'; questionText[8] = '<div><span style=\'font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000\'>In order to ' + 'reduce the high-frequency emissions in a switching voltage regulator circuit, a/an ____ circuit is ' + 'connected across the inductor, which quickly dampens this spurious resonance.</span></div><div ' + 'style=\'font-size:2pt\'></div><table cellpadding=\'0\' cellspacing=\'0\' width=\'83%\' border=\'0\'><tr valign=\'baseline\'><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>a.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times"; ' + 'font-size:12pt; color:#000000\'>antiaging</span></div></td><td><div><span style=\'font-family:"Times New ' + 'Roman", "Times", serif; font-size:12pt; color:#000000\'>c.</span></div></td><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times"; font-size:12pt; ' + 'color:#000000\'>antileveling</span></div></td></tr><tr valign=\'baseline\'><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>b.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times"; ' + 'font-size:12pt; color:#000000\'>antimatter</span></div></td><td><div><span style=\'font-family:"Times New ' + 'Roman", "Times", serif; font-size:12pt; color:#000000\'>d.</span></div></td><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times"; font-size:12pt; ' + 'color:#000000\'>antiringing</span></div></td></tr><tr height=\'0\' style=\'border:none\'><td width=\'5%\' style=\'width:18pt; ' + 'padding:0\'></td><td width=\'46%\' style=\'width:193pt; padding:0\'></td><td width=\'4%\' style=\'width:18pt; ' + 'padding:0\'></td><td width=\'45%\' style=\'width:193pt; padding:0\'></td></tr></table>'; answerText[8] = '<div class=\'default\'>D</div>'; numberText[9] = '10.'; questionText[9] = '<div><span style=\'font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000\'>When a switching ' + 'voltage regulator has an input voltage too low for proper operation, a/an ____ circuit prevents the ' + 'device from turning on.</span></div><div style=\'font-size:2pt\'></div><table cellpadding=\'0\' cellspacing=\'0\' width=\'83%\' border=\'0\'><tr valign=\'baseline\'><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>a.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times"; ' + 'font-size:12pt; color:#000000\'>ultraviolet laser</span></div></td><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>c.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times"; ' + 'font-size:12pt; color:#000000\'>undervoltage lockout</span></div></td></tr><tr ' + 'valign=\'baseline\'><td><div><span style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>b.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times"; ' + 'font-size:12pt; color:#000000\'>ultrasonic sensor</span></div></td><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>d.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times"; ' + 'font-size:12pt; color:#000000\'>up link</span></div></td></tr><tr height=\'0\' style=\'border:none\'><td width=\'5%\' style=\'width:18pt; ' + 'padding:0\'></td><td width=\'46%\' style=\'width:193pt; padding:0\'></td><td width=\'4%\' style=\'width:18pt; ' + 'padding:0\'></td><td width=\'45%\' style=\'width:193pt; padding:0\'></td></tr></table>'; answerText[9] = '<div class=\'default\'>C</div>'; numberText[10] = '11.'; questionText[10] = '<div><span style=\'font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000\'>A device used ' + 'to offer impedance to high-frequency noise that appears on both ac lines is a/an:</span></div><div ' + 'style=\'font-size:2pt\'></div><table cellpadding=\'0\' cellspacing=\'0\' width=\'83%\' border=\'0\'><tr valign=\'baseline\'><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>a.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times"; ' + 'font-size:12pt; color:#000000\'>redundant resistor</span></div></td><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>c.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times"; ' + 'font-size:12pt; color:#000000\'>channel circuit</span></div></td></tr><tr ' + 'valign=\'baseline\'><td><div><span style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>b.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times"; ' + 'font-size:12pt; color:#000000\'>common-mode choke</span></div></td><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>d.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times"; ' + 'font-size:12pt; color:#000000\'>rotary dial</span></div></td></tr><tr height=\'0\' style=\'border:none\'><td width=\'5%\' style=\'width:18pt; ' + 'padding:0\'></td><td width=\'46%\' style=\'width:193pt; padding:0\'></td><td width=\'4%\' style=\'width:18pt; ' + 'padding:0\'></td><td width=\'45%\' style=\'width:193pt; padding:0\'></td></tr></table>'; answerText[10] = '<div class=\'default\'>B</div>'; numberText[11] = '12.'; questionText[11] = '<div><span style=\'font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000\'>Since most ' + 'desktop and notebook computer systems use modular power supplies, a defect is resolved usually by the ' + '____ technique.</span></div><div style=\'font-size:2pt\'></div><table cellpadding=\'0\' cellspacing=\'0\' width=\'83%\' border=\'0\'><tr valign=\'baseline\'><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>a.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times"; ' + 'font-size:12pt; color:#000000\'>strip-and-reassemble</span></div></td><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>c.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times"; ' + 'font-size:12pt; color:#000000\'>shake-and-drop</span></div></td></tr><tr ' + 'valign=\'baseline\'><td><div><span style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>b.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times"; ' + 'font-size:12pt; color:#000000\'>freeze-and-heat</span></div></td><td><div><span ' + 'style=\'font-family:"Times New Roman", "Times", serif; font-size:12pt; ' + 'color:#000000\'>d.</span></div></td><td><div><span style=\'font-family:"Times New Roman", "Times"; ' + 'font-size:12pt; color:#000000\'>remove-and-replace</span></div></td></tr><tr height=\'0\' style=\'border:none\'><td width=\'5%\' style=\'width:18pt; ' + 'padding:0\'></td><td width=\'46%\' style=\'width:193pt; padding:0\'></td><td width=\'4%\' style=\'width:18pt; ' + 'padding:0\'></td><td width=\'45%\' style=\'width:193pt; padding:0\'></td></tr></table>'; answerText[11] = '<div class=\'default\'>D</div>'; studentName = StripSpaces(f.student_name.value); FixMTF(f); index = 0; for (i=0; i < f.length; ++i) { if (f.elements[i].name.indexOf(":") > 0) { text = StripSpaces(GetResponse(index, f.elements[i])); if (text.length == 0) ++numBlank; 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position = length; } else { if (breakPos > position) newText += text.substring(position, breakPos); newText += replaceString; position = breakPos + 1 + skipExtra; } } return(newText); } function FixMCNotes(notesText, studentText) { var displayText; var searchText; var upperNotes; var charCode; var startIndex; var endIndex; displayText = ""; if (notesText.length > 0) { if (studentText.length > 0) { upperNotes = notesText.toUpperCase(); studentText = studentText.toUpperCase(); charCode = studentText.charCodeAt(0); searchText = "/" + String.fromCharCode(charCode) + "/"; startIndex = upperNotes.indexOf(searchText); if (startIndex >= 0) { startIndex += searchText.length; searchText = "/" + String.fromCharCode(charCode + 1) + "/"; endIndex = upperNotes.indexOf(searchText, startIndex); if (endIndex < startIndex) endIndex = notesText.length; displayText = notesText.substring(startIndex, endIndex); } } if (displayText.length == 0 && notesText.charAt(0) != "/") displayText = notesText; } return(displayText); } function NumericCompare(s1, s2) { var s1Sign; var s2Sign; var tempString; var decimalCount; var decimalPos; var numToDelete; var len; var ch; var i; s1.toUpperCase(); s2.toUpperCase(); if (s1 == s2) return(true); else { s1Sign = 1; s2Sign = 1; tempString = ""; for (i=0; i < s1.length; ++i) { ch = s1.charAt(i); if (ch == "-" && tempString.length == 0) s1Sign = -1; else if ((ch >= "0" && ch <= "9") || ch == ".") tempString += ch; } s1 = tempString; decimalCount = 0; decimalPos = -1; for (i=0; i < s1.length; ++i) { if (s1.charAt(i) == '.') { ++decimalCount; if (decimalPos < 0) decimalPos = i; } } if (decimalCount == 1 && decimalPos >= 0) { len = s1.length; for (i=len - 1; i >= decimalPos; --i) { if (i == decimalPos || s1.charAt(i) == '0') len = i; else break; } if (len < s1.length) s1 = s1.substring(0, len); if (s1.length == 0) s1 = "0"; } numToDelete = 0; for (i=0; i < s1.length; ++i) { if (s1.charAt(i) == "0") ++numToDelete; else break; } if (numToDelete > 0) { if (numToDelete == s1.length) --numToDelete; 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var endIndex; var partialText; responseText = responseText.toUpperCase(); answerText = answerText.toUpperCase(); startIndex = 0; do { endIndex = answerText.indexOf("\r", startIndex); if (endIndex < 0) partialText = answerText.substring(startIndex); else partialText = answerText.substring(startIndex, endIndex); if (responseText == partialText) return(true); startIndex = endIndex + 1; } while (endIndex > 0); return(false); } function FixMTF(f) { var text; var letter; var theList; var listIndex; var number; var i; for (i=0; i < f.length; ++i) { if (f.elements[i].name.indexOf("MTF:") == 0) { number = parseInt(f.elements[i].name.substring(4), 10); theList = f["MTF-" + number + "-1"]; if (theList) { listIndex = theList.selectedIndex; letter = theList.options[listIndex].text; } else letter = ""; text = StripSpaces(f["MTF-" + number + "-2"].value); if (text == "") f.elements[i].value = letter; else f.elements[i].value = letter + "," + text; } } } function AllowReset() { return(window.confirm("Do you want to clear all of your answers?")); } // --> </script> </head> <body onResize='if(document.layers && navigator.appVersion.indexOf("Win") < 0){history.go(0);}' bgcolor='#FFFFFF' style='background-image:url(chapter12_files/header.gif); background-repeat:no-repeat'> <noscript> <h3><font color='#FF0000'>Javascript not enabled</font></h3> </noscript> <script language='JavaScript'> <!-- if (navigator.appName.indexOf("Netscape") >= 0) { if (parseInt(navigator.appVersion.charAt(0)) < 4) alert("This document requires Netscape Navigator version 4.0 or later."); } else if (navigator.appName.indexOf("Explorer") >= 0) { if (parseInt(navigator.appVersion.charAt(0)) < 4) alert("This document requires Internet Explorer version 4.0 or later."); } // --> </script> <form name='TestForm' onReset='return(AllowReset(this))'> <table align='left' width='100%' border=0 cellspacing=0> <tr valign='top'> <td> <div class='headerspacer'>&nbsp;</div> <b>Name:</b>&nbsp;<input type='text' name='student_name' size='30'><br> <div class='spacer'>&nbsp;</div> <br> <p class="title">Chapter 12</p> </td> </tr> </table> <br clear='all'> <table align='left' width='100%' border=0 cellpadding=0 cellspacing=0> <!-- BEGIN: INSTRUCTION --> <tr valign='top'> <td colspan='3'><br> <div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'><b>Multiple Choice</b></span><span style='font-family:"Times New Roman", "Times", serif; font-size:10pt; color:#000000'><br></span></div><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'><i>Identify the letter of the choice that best completes the statement or answers the question.</i></span></div> <div class='spacer'>&nbsp;</div> </td> </tr> <!-- END: INSTRUCTION --> <!-- BEGIN: QUESTION -72601:16 --> <tr valign='baseline'> <td> <select name='MC:1' align='top'> <option value=' '> <option value='A'>A <option value='B'>B <option value='C'>C <option value='D'>D </select> </td> <td> <p class='qnumber'>1.&nbsp;</p> </td> <td width='100%'> <div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>A ____ circuit maintains a constant load voltage even if the line voltage or load current experience changes.</span></div><div style='font-size:2pt'></div><table cellpadding='0' cellspacing='0' width='83%' border='0'><tr valign='baseline'><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>a.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>videotex</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>c.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>volatile storage</span></div></td></tr><tr valign='baseline'><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>b.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>visible light</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>d.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>voltage regulator</span></div></td></tr><tr height='0' style='border:none'><td width='5%' style='width:18pt; padding:0'></td><td width='46%' style='width:193pt; padding:0'></td><td width='4%' style='width:18pt; padding:0'></td><td width='45%' style='width:193pt; padding:0'></td></tr></table> <div class='spacer'>&nbsp;</div> </td> </tr> <!-- END: QUESTION -72601:16 --> <!-- BEGIN: QUESTION -72601:17 --> <tr valign='baseline'> <td> <select name='MC:2' align='top'> <option value=' '> <option value='A'>A <option value='B'>B <option value='C'>C <option value='D'>D </select> </td> <td> <p class='qnumber'>2.&nbsp;</p> </td> <td width='100%'> <div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>If percent line regulation = 100 </span><span style='font-family:"Symbol"; font-size:12pt; color:#000000'>&#180;</span><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'> (v<sub>REG(max)</sub> - v<sub>REG(min)</sub>)/(v<sub>LINE(max)</sub> - v<sub>LINE(min)</sub>) and v<sub>REG(max)</sub> = 12.1 v, v<sub>REG(min)</sub> = 11.9 v, v<sub>LINE(max) </sub>= 120 V, and v<sub>LINE(min)</sub> = 110V, then the percent line regulation =</span></div><div style='font-size:2pt'></div><table cellpadding='0' cellspacing='0' width='83%' border='0'><tr valign='baseline'><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>a.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>0.5 %</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>c.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>2%</span></div></td></tr><tr valign='baseline'><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>b.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>1%</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>d.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>20%</span></div></td></tr><tr height='0' style='border:none'><td width='5%' style='width:18pt; padding:0'></td><td width='46%' style='width:193pt; padding:0'></td><td width='4%' style='width:18pt; padding:0'></td><td width='45%' style='width:193pt; padding:0'></td></tr></table> <div class='spacer'>&nbsp;</div> </td> </tr> <!-- END: QUESTION -72601:17 --> <!-- BEGIN: QUESTION -72601:19 --> <tr valign='baseline'> <td> <select name='MC:3' align='top'> <option value=' '> <option value='A'>A <option value='B'>B <option value='C'>C <option value='D'>D </select> </td> <td> <p class='qnumber'>3.&nbsp;</p> </td> <td width='100%'> <div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>____ describes a voltage regulator's ability to maintain a constant voltage when the load current changes.</span></div><div style='font-size:2pt'></div><table cellpadding='0' cellspacing='0' width='83%' border='0'><tr valign='baseline'><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>a.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>Line regulation</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>c.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>Light registration</span></div></td></tr><tr valign='baseline'><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>b.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>Load regulation</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>d.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>Local exchange</span></div></td></tr><tr height='0' style='border:none'><td width='5%' style='width:18pt; padding:0'></td><td width='46%' style='width:193pt; padding:0'></td><td width='4%' style='width:18pt; padding:0'></td><td width='45%' style='width:193pt; padding:0'></td></tr></table> <div class='spacer'>&nbsp;</div> </td> </tr> <!-- END: QUESTION -72601:19 --> <!-- BEGIN: QUESTION -72601:26 --> <tr valign='baseline'> <td> <select name='MC:4' align='top'> <option value=' '> <option value='A'>A <option value='B'>B <option value='C'>C <option value='D'>D </select> </td> <td> <p class='qnumber'>4.&nbsp;</p> </td> <td width='100%'> <div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>If a stable reference voltage is connected on the noninverting input of a noninverting amplifier and a feedback path is provided on the inverting input of that op amp, a corrective action happens so quickly that the feedback voltage is compared against that reference voltage and a corrective action is sent to the transistor. This op amp is sometimes called a/an ____ amplifier.</span></div><div style='font-size:2pt'></div><table cellpadding='0' cellspacing='0' width='83%' border='0'><tr valign='baseline'><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>a.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>error</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>c.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>current</span></div></td></tr><tr valign='baseline'><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>b.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>logarithmic</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>d.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>exponential</span></div></td></tr><tr height='0' style='border:none'><td width='5%' style='width:18pt; padding:0'></td><td width='46%' style='width:193pt; padding:0'></td><td width='4%' style='width:18pt; padding:0'></td><td width='45%' style='width:193pt; padding:0'></td></tr></table> <div class='spacer'>&nbsp;</div> </td> </tr> <!-- END: QUESTION -72601:26 --> <!-- BEGIN: QUESTION -72601:27 --> <tr valign='baseline'> <td> <select name='MC:5' align='top'> <option value=' '> <option value='A'>A <option value='B'>B <option value='C'>C <option value='D'>D </select> </td> <td> <p class='qnumber'>5.&nbsp;</p> </td> <td width='100%'> <div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>If v<sub>o</sub> = v<sub>REG</sub>((r<sub>2</sub>/r<sub>1</sub>) + 1) and v<sub>REG</sub> = 1.1 V, r<sub>2</sub> = 6.8 </span><span style='font-family:"Symbol"; font-size:12pt; color:#000000'>W, </span><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>and r<sub>1</sub> = 560 </span><span style='font-family:"Symbol"; font-size:12pt; color:#000000'>W</span><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>, then v<sub>o</sub> =</span></div><div style='font-size:2pt'></div><table cellpadding='0' cellspacing='0' width='83%' border='0'><tr valign='baseline'><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>a.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>90.6 mV</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>c.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>14.5 V</span></div></td></tr><tr valign='baseline'><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>b.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>1.34 V</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>d.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>12.1 V</span></div></td></tr><tr height='0' style='border:none'><td width='5%' style='width:18pt; padding:0'></td><td width='46%' style='width:193pt; padding:0'></td><td width='4%' style='width:18pt; padding:0'></td><td width='45%' style='width:193pt; padding:0'></td></tr></table> <div class='spacer'>&nbsp;</div> </td> </tr> <!-- END: QUESTION -72601:27 --> <!-- BEGIN: QUESTION -72601:33 --> <tr valign='baseline'> <td> <select name='MC:6' align='top'> <option value=' '> <option value='A'>A <option value='B'>B <option value='C'>C <option value='D'>D </select> </td> <td> <p class='qnumber'>6.&nbsp;</p> </td> <td width='100%'> <div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>A regulator circuit that uses +5 V as input and generates a regulated +3.3 V as output is called a step-down converter or a ____ regulator.</span></div><div style='font-size:2pt'></div><table cellpadding='0' cellspacing='0' width='83%' border='0'><tr valign='baseline'><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>a.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>backward</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>c.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>blocked</span></div></td></tr><tr valign='baseline'><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>b.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>buck</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>d.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>boost</span></div></td></tr><tr height='0' style='border:none'><td width='5%' style='width:18pt; padding:0'></td><td width='46%' style='width:193pt; padding:0'></td><td width='4%' style='width:18pt; padding:0'></td><td width='45%' style='width:193pt; padding:0'></td></tr></table> <div class='spacer'>&nbsp;</div> </td> </tr> <!-- END: QUESTION -72601:33 --> <!-- BEGIN: QUESTION -72601:34 --> <tr valign='baseline'> <td> <select name='MC:7' align='top'> <option value=' '> <option value='A'>A <option value='B'>B <option value='C'>C <option value='D'>D </select> </td> <td> <p class='qnumber'>7.&nbsp;</p> </td> <td width='100%'> <div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>A switching regulator whose output voltage is higher than the input voltage is called a step-up converter or a ____ regulator.</span></div><div style='font-size:2pt'></div><table cellpadding='0' cellspacing='0' width='83%' border='0'><tr valign='baseline'><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>a.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>backward</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>c.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>blocked</span></div></td></tr><tr valign='baseline'><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>b.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>boost</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>d.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>buck</span></div></td></tr><tr height='0' style='border:none'><td width='5%' style='width:18pt; padding:0'></td><td width='46%' style='width:193pt; padding:0'></td><td width='4%' style='width:18pt; padding:0'></td><td width='45%' style='width:193pt; padding:0'></td></tr></table> <div class='spacer'>&nbsp;</div> </td> </tr> <!-- END: QUESTION -72601:34 --> <!-- BEGIN: QUESTION -72601:36 --> <tr valign='baseline'> <td> <select name='MC:8' align='top'> <option value=' '> <option value='A'>A <option value='B'>B <option value='C'>C <option value='D'>D </select> </td> <td> <p class='qnumber'>8.&nbsp;</p> </td> <td width='100%'> <div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>A switching voltage regulator circuit can be operated in the ____ modulation mode where the duty cycle of the current waveform is constant and the frequency is then varied to control the actual output voltage.</span></div><div style='font-size:2pt'></div><table cellpadding='0' cellspacing='0' width='83%' border='0'><tr valign='baseline'><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>a.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>pulse width</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>c.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>dispersion</span></div></td></tr><tr valign='baseline'><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>b.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>pulse frequency</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>d.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>duplex</span></div></td></tr><tr height='0' style='border:none'><td width='5%' style='width:18pt; padding:0'></td><td width='46%' style='width:193pt; padding:0'></td><td width='4%' style='width:18pt; padding:0'></td><td width='45%' style='width:193pt; padding:0'></td></tr></table> <div class='spacer'>&nbsp;</div> </td> </tr> <!-- END: QUESTION -72601:36 --> <!-- BEGIN: QUESTION -72601:37 --> <tr valign='baseline'> <td> <select name='MC:9' align='top'> <option value=' '> <option value='A'>A <option value='B'>B <option value='C'>C <option value='D'>D </select> </td> <td> <p class='qnumber'>9.&nbsp;</p> </td> <td width='100%'> <div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>In order to reduce the high-frequency emissions in a switching voltage regulator circuit, a/an ____ circuit is connected across the inductor, which quickly dampens this spurious resonance.</span></div><div style='font-size:2pt'></div><table cellpadding='0' cellspacing='0' width='83%' border='0'><tr valign='baseline'><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>a.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>antiaging</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>c.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>antileveling</span></div></td></tr><tr valign='baseline'><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>b.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>antimatter</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>d.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>antiringing</span></div></td></tr><tr height='0' style='border:none'><td width='5%' style='width:18pt; padding:0'></td><td width='46%' style='width:193pt; padding:0'></td><td width='4%' style='width:18pt; padding:0'></td><td width='45%' style='width:193pt; padding:0'></td></tr></table> <div class='spacer'>&nbsp;</div> </td> </tr> <!-- END: QUESTION -72601:37 --> <!-- BEGIN: QUESTION -72601:38 --> <tr valign='baseline'> <td> <select name='MC:10' align='top'> <option value=' '> <option value='A'>A <option value='B'>B <option value='C'>C <option value='D'>D </select> </td> <td> <p class='qnumber'>10.&nbsp;</p> </td> <td width='100%'> <div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>When a switching voltage regulator has an input voltage too low for proper operation, a/an ____ circuit prevents the device from turning on.</span></div><div style='font-size:2pt'></div><table cellpadding='0' cellspacing='0' width='83%' border='0'><tr valign='baseline'><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>a.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>ultraviolet laser</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>c.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>undervoltage lockout</span></div></td></tr><tr valign='baseline'><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>b.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>ultrasonic sensor</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>d.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>up link</span></div></td></tr><tr height='0' style='border:none'><td width='5%' style='width:18pt; padding:0'></td><td width='46%' style='width:193pt; padding:0'></td><td width='4%' style='width:18pt; padding:0'></td><td width='45%' style='width:193pt; padding:0'></td></tr></table> <div class='spacer'>&nbsp;</div> </td> </tr> <!-- END: QUESTION -72601:38 --> <!-- BEGIN: QUESTION -72601:41 --> <tr valign='baseline'> <td> <select name='MC:11' align='top'> <option value=' '> <option value='A'>A <option value='B'>B <option value='C'>C <option value='D'>D </select> </td> <td> <p class='qnumber'>11.&nbsp;</p> </td> <td width='100%'> <div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>A device used to offer impedance to high-frequency noise that appears on both ac lines is a/an:</span></div><div style='font-size:2pt'></div><table cellpadding='0' cellspacing='0' width='83%' border='0'><tr valign='baseline'><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>a.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>redundant resistor</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>c.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>channel circuit</span></div></td></tr><tr valign='baseline'><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>b.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>common-mode choke</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>d.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>rotary dial</span></div></td></tr><tr height='0' style='border:none'><td width='5%' style='width:18pt; padding:0'></td><td width='46%' style='width:193pt; padding:0'></td><td width='4%' style='width:18pt; padding:0'></td><td width='45%' style='width:193pt; padding:0'></td></tr></table> <div class='spacer'>&nbsp;</div> </td> </tr> <!-- END: QUESTION -72601:41 --> <!-- BEGIN: QUESTION -72601:44 --> <tr valign='baseline'> <td> <select name='MC:12' align='top'> <option value=' '> <option value='A'>A <option value='B'>B <option value='C'>C <option value='D'>D </select> </td> <td> <p class='qnumber'>12.&nbsp;</p> </td> <td width='100%'> <div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>Since most desktop and notebook computer systems use modular power supplies, a defect is resolved usually by the ____ technique.</span></div><div style='font-size:2pt'></div><table cellpadding='0' cellspacing='0' width='83%' border='0'><tr valign='baseline'><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>a.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>strip-and-reassemble</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>c.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>shake-and-drop</span></div></td></tr><tr valign='baseline'><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>b.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>freeze-and-heat</span></div></td><td><div><span style='font-family:"Times New Roman", "Times", serif; font-size:12pt; color:#000000'>d.</span></div></td><td><div><span style='font-family:"Times New Roman", "Times"; font-size:12pt; color:#000000'>remove-and-replace</span></div></td></tr><tr height='0' style='border:none'><td width='5%' style='width:18pt; padding:0'></td><td width='46%' style='width:193pt; padding:0'></td><td width='4%' style='width:18pt; padding:0'></td><td width='45%' style='width:193pt; padding:0'></td></tr></table> <div class='spacer'>&nbsp;</div> </td> </tr> <!-- END: QUESTION -72601:44 --> </table> <br clear='all'> <br> <br> <TABLE ALIGN='LEFT' WIDTH='100%' CELLPADDING='0' CELLSPACING='0' BORDER='0'> <TR> <TD COLSPAN='2' BGCOLOR='#000000'> <DIV STYLE='font-size:1pt'>&nbsp;</DIV> </TD> </TR> <TR> <TD> <a href='javascript:alert("Use the mouse to submit.")' onMouseOver='window.status = "Check Your Work"; return true' onMouseOut='window.status = ""; return true' onFocus='window.status = "Check Your Work"; return true' onBlur='window.status = ""; return true' onClick="return(GradeIt(document.forms[0]))"> <img src='/companions/quiz/examview_graphics/chkwork.gif' BORDER=0 alt='Check Your Work'></a> &nbsp;&nbsp;&nbsp; <a href='javascript:document.forms[0].reset()'> <img src='/companions/quiz/examview_graphics/reset.gif' BORDER=0 alt='Reset'></a> </TD> <TD ALIGN='RIGHT'> <A HREF='http://www.examview.com/studytip.html'> <img src='/companions/quiz/examview_graphics/help.gif' BORDER=0 ALT='Help'></A> </TD> </TR> </TABLE> </form> </body> </html>