Deck 22: Resistive-Capacitive Series Circuits

Question 1

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

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

Answer 1

A

Question 2

In a series RC circuit, ET = 240 V, R = 40 Ω, and XC = 30 Ω. What is EC?

A) 37.14 V
B) 62.86 V
C) 92 V
D) 144 V

Answer 2

D

Question 3

A series RC circuit contains two resistors and two capacitors. The resistors are 82 Ω and 47 Ω. The capacitors have capacitive reactances of 80 Ω and 50 Ω. What is the total impedance?

A) 14.56 Ω
B) 68.62 Ω
C) 84.75 Ω
D) 183.14 Ω

Answer 3

D

Question 4

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

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

Question 5

A capacitor that has an XC of 40 Ω is connected to a 60 Hz voltage. What is the capacitance?

A) 66.31 μF
B) 75.80 μF
C) 99.48 μF
D) 100.52 μF

Question 6

In a series RC circuit, ET = 240 V, R = 40 Ω, and XC = 30 Ω. What is ER?

A) 144 V
B) 157.14 V
C) 192 V
D) 202.86 V

Question 7

The of a circuit is the cosine of the phase angle.

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

Question 8

You connect a clamp-on ammeter and a voltmeter to a series RC circuit powered by a 60-Hz circuit. The voltage reads 240 V and the current is 0.715 A. The resistor is 150 Ω. What is the true power?

A) 111.6 W
B) 153.36 W
C) 192 W
D) 335.66 W

Question 9

A series RC circuit has two resistors and two capacitors. The resistors dissipate 9 W and 15 W. The capacitive powers are 18 VARs and 9 VARs. The applied voltage is 277 V. What is the circuit current?

A) 7.67 A
B) 7.67 mA
C) 130.4 A
D) 130.4 mA

Question 10

A series RC circuit contains two resistors and two capacitors. The resistors are 27 Ω and 56 Ω. The capacitors have capacitive reactances of 50 Ω and 40 Ω. What is angle theta?

A) 47.31°
B) 52.75°
C) 67.25°
D) 72.68°

Question 11

In a series RC circuit, the resistor voltage is 124 V and the capacitor voltage is 167 V. What is the total voltage?

A) 111 V
B) 143 V
C) 208 V
D) 240 V

Question 12

A series RC circuit has a resistance of 155 Ω and a capacitive reactance of 270 Ω. What is angle theta?

A) 44.97°
B) 55.03°
C) 60.14°
D) 89.86°

Question 13

In a series RC circuit, apparent power can be calculated by .

A) ET × I
B) ER × I
C) EC × I

Question 14

In a series RC circuit, total impedance is a combination of resistance and capacitive reactance.

Question 15

In a capacitive circuit, the voltage leads the current by 90 electric degrees.

Question 16

In a series RC circuit, ET = 240 V, R = 150 Ω, and XC = 270 Ω. What is the reactive power?

A) 126.48 VARs
B) 163 VARs
C) 190.56 VARs
D) 253.56 VARs

Question 17

A series RC circuit contains two resistors and two capacitors. The resistors are 68 Ω and 56 Ω. The capacitors have capacitive reactances of 66 Ω and 33 Ω. The applied voltage is 240 V. What is the voltage drop on the 56 Ω resistor?

A) 39.83 V
B) 49.91 V
C) 84.70 V
D) 102.85 V

Question 18

In a series RC circuit, ET = 240 V, R = 30 Ω, and XC = 40 Ω. What is the apparent power?

A) 168.2 VA
B) 691.2 VA
C) 921.6 VA
D) 1152 VA

Question 19

In a series RC circuit, ET = 240 V, R = 500 Ω, and XC = 500 Ω. What is the true power?

A) 28.8 W
B) 57.62 W
C) 64.4 W
D) 70.72 W

Question 20

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

A) VA
B) W
C) VARs

Question 21

A series RC circuit contains two resistors and two capacitors. The resistors are 39 Ω and 56 Ω. The capacitors have capacitive reactances of 80 Ω and 40 Ω. When calculating the circuit values, what is the total resistance?

A) 25 Ω
B) 95 Ω
C) 125 Ω
D) 130 Ω

Question 22

A series RC circuit contains two resistors and two capacitors. The resistors are 39 Ω and 68 Ω. The capacitors have capacitive reactances of 60 Ω and 50 Ω. The applied voltage is 240 V. What is the voltage drop on the capacitor that has 50 Ω of reactance?

A) 93.84 V
B) 106.35 V
C) 178.2 V
D) 260.99 V

Question 23

A series RC circuit contains two resistors and two capacitors. The resistors are 120 Ω and 470 Ω. The capacitors have capacitive reactances of 600 Ω and 300 Ω. When calculating the circuit values, what is the total capacitive reactance?

A) 390 Ω
B) 900 Ω
C) 1000 Ω
D) 1290 Ω