Deck 18: Resistive-Inductive Series Circuits

Question 1

A series RL circuit contains two resistors and two inductors. The resistors are 27 Ω and 47 Ω. The inductors have inductive reactances of 50 Ω and 40 Ω. The applied voltage is 120 V. What is the voltage drop on the inductor that has 40 Ω of reactance?

A) 28.41 V
B) 41.2 V
C) 51.5 V
D) 67.81 V

Answer 1

B

Question 2

In a series RL circuit, ET = 120 V, R = 40 Ω, and XL = 30 Ω. What is ER?

A) 72 V
B) 88.57 V
C) 96 V
D) 151.43 V

Answer 2

C

Question 3

A series RL circuit contains two resistors and two inductors. The resistors are 43 Ω and 54 Ω. The inductors have inductive reactances of 70 Ω and 40 Ω. The total impedance is .

A) 52.15 Ω
B) 67.20 Ω
C) 84.94 Ω
D) 146.66 Ω

Answer 3

D

Question 4

A series RL circuit has a resistance of 270 Ω and an inductive reactance of 155 Ω. How many degrees is angle theta (∠θ)?

A) 4.97°
B) 5.03°
C) 10.14°
D) 29.86°

Question 5

In a series RL circuit, ET = 120 V, R = 500 Ω, and XL = 500 Ω. What is the true power?

A) 8.8 W
B) 14.4 W
C) 17.2 W
D) 20.36 W

Question 6

Dividing a circuit's total applied voltage by the total impedance results in the total .

A) current
B) power
C) VA
D) VARs

Question 7

In a series RL circuit, ET = 120 V, R = 40 Ω, and XL = 30 Ω. How much is EL?

A) 72 V
B) 78.57 V
C) 86 V
D) 91.43 V

Question 8

In a series circuit, the total is equal to the sum of the individual resistors.

A) current
B) amperage
C) voltage
D) resistance

Question 9

Of the different power values in an RL circuit, which one is known as quadrature power?

A) VA
B) W
C) VARs

Question 10

Power factor (PF) is the ratio of the power to the power.

A) true; apparent
B) apparent; true
C) apparent; reactive
D) reactive; apparent

Question 11

In a series RL circuit ET = 120 V, R = 150 Ω, and XL = 270 Ω. What is the reactive power?

A) 36.62 VARs
B) 40.75 VARs
C) 42.64 VARs
D) 53.39 VARs

Question 12

Of the different power values in an RL circuit, which one is known as apparent power?

A) VA
B) VARs
C) W

Question 13

A series RL circuit contains two resistors. The resistors are 33 Ω and 47 Ω. When calculating the circuit values, the total resistance used is .

A) 56 Ω
B) 60 Ω
C) 68 Ω
D) 80 Ω

Question 14

In a series RL circuit, the angle between the voltage and current is called angle theta (∠θ). The cosine of the angle is equal to the .

A) watts
B) power factor
C) VARs
D) volt-amperes

Question 15

A series RL circuit contains two resistors and two inductors. The resistors are 33 Ω and 47 Ω. The inductors have inductive reactances of 60 Ω and 30 Ω. Angle theta is .

A) 48.37°
B) 52.27°
C) 63.97°
D) 72.55°

Question 16

You connect a clamp-on ammeter and a voltmeter to a series RL circuit powered by a 60-Hz circuit. The voltage reads 120 V and the current is 0.715 A. The resistor is 150 Ω. What is the true power?

A) 65.8 W
B) 76.68 W
C) 86 W
D) 167.83 W

Question 17

A series RL circuit contains two resistors and two inductors. The resistors are 33 Ω and 47 Ω. The inductors have inductive reactances of 60 Ω and 30 Ω. The applied voltage is 120 V. What is the voltage drop on the 33 Ω resistor?

A) 32.89 V
B) 46.84 V
C) 55 V
D) 60 V

Question 18

In a series RL circuit, ET = 120 V, R = 30 Ω, and XL = 40 Ω. What is the apparent power?

A) 17.92 VA
B) 172.8 VA
C) 230.4 VA
D) 288 VA

Question 19

Of the different power values in an RL circuit, which one is known as wattless power?

A) VA
B) VARs
C) W

Question 20

A series RL circuit contains two resistors. The resistors are 60 Ω and 30 Ω. When calculating the circuit values, the total resistance used is .

A) 30 Ω
B) 60 Ω
C) 80 Ω
D) 90 Ω

Question 21

A series RL circuit has two resistors and two inductors. The resistors dissipate 7 W and 12 W. The inductive powers are 15 VARs and 8 VARs. The applied voltage is 240 V. How much is the circuit current?

A) 8.045 A
B) 10.43 A
C) 19.83 A
D) 22.63 A