# Quiz 17: Reactive Circuits and Power Factor

Business

Q 1Q 1

What is the relationship of current and voltage in a purely inductive circuit?
A) The current lags the voltage by 90.
B) The current leads the voltage by 90.
C) The current and voltage are 180 out of phase with each other.
D) The current and voltage are in phase with each other.

Free

Multiple Choice

A

Q 2Q 2

An inductor with an inductive reactance of 48 is connected in parallel with a 32 resistor. What is the total impedance of this circuit?
A) 80
C) 26.6
B) 19.2
D) 57.7

Free

Multiple Choice

C

Free

Multiple Choice

D

Q 4Q 4

What is the relationship between current and voltage in a purely resistive circuit?
A) The current lags the voltage by 90.
B) The current leads the voltage by 90.
C) The current and voltage are 180 out of phase with each other.
D) The current and voltage are in phase with each other.

Free

Multiple Choice

Q 5Q 5

When AC is applied across a capacitor, a ____ phase shift exists between the circuit current and capacitor voltage.
A) 45
C) 63.2
B) 60
D) 90

Free

Multiple Choice

Q 6Q 6

Total opposition to current in a circuit that contains a combination of resistance and reactance is called ____.
A) resistance
C) VARs
B) impedance
D) reactance

Free

Multiple Choice

Q 7Q 7

The unit of measurement of capacitance is called a(n)____.
A) ohm ()
C) henry (H)
B) farad (F)
D) volt (V)

Free

Multiple Choice

Q 8Q 8

A circuit contains resistance and inductance connected in series. The resistor has a true power of 560 W. The inductor has a reactive power of 430 VARs. What is the power factor of this circuit?
A) 79.3%
C) 60.9%
B) 76.8%
D) 83%

Free

Multiple Choice

Q 9Q 9

What is the relationship of current and voltage in a purely capacitive circuit?
A) The current lags the voltage by 90.
B) The current leads the voltage by 90.
C) The current and voltage are 180 out of phase with each other.
D) The current and voltage are in phase with each other.

Free

Multiple Choice

Q 10Q 10

A 100 µF capacitor is connected to a 120 V, 60 Hz power line. What is the capacitive reactance of this circuit?
A) 0.04
C) 26.54
B) 43.7
D) 94.2

Free

Multiple Choice

Q 11Q 11

What statement could be made concerning the phase angle in a circuit containing a small resistor and a large inductive reactance?
A) The phase angle will be 0.
B) The phase angle will be greater than 0 but less than 45.
C) The phase angle will be greater than 45 but less than 90.
D) The phase angle will be 90.

Free

Multiple Choice

Q 12Q 12

The phase separation between the three single-phase AC sine waves in three-phase AC is ____.
A) 0°
C) 90°
B) 45°
D) 120°

Free

Multiple Choice

Free

True False

Free

True False

Q 15Q 15

Two ___________________ in close proximity that are separated by some type of insulating material form a device called a capacitor

Free

Short Answer