Chapter 16: Inductive AC Circuits
MULTIPLE CHOICE
1. The applied voltage and the induced voltage are ____ degrees out of phase with each other in an
inductive circuit.
a.
30
c.
90
b.
60
d.
180
2. In a purely inductive circuit, the current lags behind the applied voltage by ____ degrees.
a.
30
c.
90
b.
60
d.
180
3. Inductive reactance is measured in ____.
a.
farads
c.
ohms
b.
henries
d.
watts
4. Inductive reactance ____ with the increase in frequency.
a.
increases
c.
stays the same
b.
decreases
d.
declines proportionally
5. The inductive reactance in an AC circuit is ____ proportional to the applied voltage and ____
proportional to the current.
a.
directly, inversely
c.
directly, directly
b.
inversely, directly
d.
inversely, inversely
6. Impedance is expressed in ____.
a.
farads
c.
ohms
b.
henries
d.
watts
7. Impedance is designated by the letter ____.
a.
I
c.
Y
b.
J
d.
Z
8. When inductors are connected in series, the inductive reactance is equal to the ____.
a.
product of the individual inductive reactance values
b.
product of the reciprocals of the individual inductive reactance values
c.
sum of the individual inductive reactance values
d.
sum of the reciprocals of the individual inductive reactance values
9. When inductors are connected in parallel, the reciprocal of the inductive reactance is equal to the ____.
a.
product of the individual inductive reactance values
b.
product of the reciprocals of the individual inductive reactance values
c.
sum of the individual inductive reactance values
d.
sum of the reciprocals of the individual inductive reactance values
10. Inductors have the advantage over capacitors of providing a reactive effect while still completing a(n)
____ circuit path.
a.
AC
c.
series
b.
DC
d.
parallel
COMPLETION
1. The opposition offered to current flow by an inductor in an AC circuit is called
____________________.
2. The ____________________ of a circuit containing both inductance and resistance is the total
opposition to current flow by both the inductor and the resistor.
3. The frequency above or below the frequencies passed or attenuated is called the
____________________.
SHORT ANSWER
1. Describe the phase relationship between current and voltage in an inductive AC circuit.
2. Why are inductors sometimes combined with capacitors in a circuit?
