Name: 
 

Chapter 12



Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
 

1. 

Reactive power is often referred to as ____ power.
a.
capacitance
c.
wattless
b.
inductance
d.
impedance
 

2. 

Reactance is symbolized by the letter ____.
a.
R
c.
X
b.
L
d.
Z
 

3. 

Inductive reactance can be computed when the values of inductance and frequency are known and is measured in ____.
a.
watts
c.
vectors
b.
ohms
d.
amperage
 

4. 

The symbol for an inductor shown with two parallel lines represents a(n) ____ inductor.
a.
air core
c.
straight line
b.
transient
d.
iron core
 

5. 

If two inductors, with values of 2 H and 3 H, are connected in parallel, the total inductance would equal ____ H.
a.
2
c.
1
b.
1.2
d.
.83
 

6. 

In a pure inductive circuit, the current lags the voltage by ____ degrees.
a.
270
c.
90
b.
180
d.
0
 

7. 

Although essentially no true power is being used, an electrical instrument called VARs is used to measure the ____ in a pure inductive circuit.
a.
capacitance
c.
amperage
b.
resistance
d.
reactive power
 

8. 

The amount of resistance compared with the inductive reactance determines the ____ of the coil.
a.
H
c.
F
b.
voltage
d.
Q
 

9. 

To determine the Q of an inductor, divide the inductive reactance by the ____.
a.
voltage
c.
resistance
b.
amperage
d.
wattage
 

10. 

Although inductors have some amount of resistance, inductors that have a Q of ____ or greater are generally considered to be pure inductors.
a.
8
c.
15
b.
10
d.
20
 



 
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