Deck 18: Resistive-Inductive Series Circuits

Question 1

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

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

Answer 1

D

Question 2

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

A) VA
B) W
C) VARs

Answer 2

C

Question 3

In a series RL circuit, E_T = 120 V, R = 40 Ω , and X_L = 30 Ω . What is E_R?

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

Answer 3

C

Question 4

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 5

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 6

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 7

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

A) VA
B) VARs
C) W

Question 8

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 9

In a series RL circuit, E_T = 120 V, R = 40 Ω , and X_L = 30 Ω . How much is E_L?

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

Question 10

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

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

Question 11

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

A) VA
B) VARs
C) W

Question 12

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

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

Question 13

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

Question 14

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

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

Question 15

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 16

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 17

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

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

Question 18

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 19

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

Question 20

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 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