Deck 23: Resistive-Capacitive Parallel Circuits

Question 1

In an RC parallel circuit, E_T = 208 V, R = 42 k Ω , and X_C = 47 k Ω . What is Z?

A) 19 k Ω
B) 22.18 k Ω
C) 23.03 k Ω
D) 31.32 k Ω

Answer 1

D

Question 2

In an RC parallel circuit, E_T = 240 V, R = 4 k Ω , and X_C = 3.3 k Ω . What is I_R?

A) 32.88 mA
B) 46.28 mA
C) 60 mA
D) 72.72 mA

Answer 2

C

Question 3

In an RC parallel circuit, E_T = 120 V, R = 40 Ω , and X_C = 30 Ω . What is I_T?

A) 5 A
B) 6 A
C) 7 A
D) 8 A

Answer 3

A

Question 4

In an RC parallel circuit, E_T = 277 V, R = 82 k Ω , and X_C = 33 k Ω . What is the apparent power?

A) 2.33 VA
B) 2.51 VA
C) 2.93 VA
D) 3.26 VA

Question 5

In an RC parallel circuit, E_T = 240 V, R = 10 k Ω , and X_C = 8.2 k Ω . What is I_C?

A) 18.56 mA
B) 29.27 mA
C) 33.18 mA
D) 44 mA

Question 6

In an RC parallel circuit, E_T = 240 V, R = 40 Ω , and X_C = 30 Ω . What is I_C?

A) 3.42 A
B) 4.8 A
C) 6 A
D) 8 A

Question 7

In an RC parallel circuit, E_T = 240 V, R = 500 Ω , and X_C = 470 Ω . What is the reactive power?

A) 59.38 VARs
B) 83.94 VARs
C) 122.55 VARs
D) 215.2 VARs

Question 8

In an RC parallel circuit, the amount of phase angle shift depends on the ratio of the amount of _____.

A) resistance to capacitance
B) watts to volt-amperes
C) capacitance to voltage
D) VARs to volt-amperes

Question 9

In an RC parallel circuit, E_T = 240 V, R = 1000 Ω , and X_C = 1500 Ω . What is the apparent power?

A) 38.4 VA
B) 57.6 VA
C) 56 VA
D) 69.23 VA

Question 10

In an RC parallel circuit, E_T = 240 V, R = 40 Ω , and X_C = 30 Ω . What is I_R?

A) 3.42 A
B) 4 A
C) 4.8 A
D) 6 A

Question 11

In an RC parallel circuit, E_T = 120 V, R = 300 Ω , and X_C = 400 Ω . What is P?

A) 20.57 W
B) 36 W
C) 48.8 W
D) 58 W

Question 12

In an RC parallel circuit, E_T = 120 V, R = 3.6 k Ω , and X_C = 5.6 k Ω . What is P?

A) 4 W
B) 5.57 W
C) 6.16 W
D) 7 W

Question 13

In an RC parallel circuit, E_T = 277 V, R = 24 k Ω , and X_C = 39 k Ω . What is the power factor?

A) 10%
B) 61.54%
C) 85.17%
D) 92.41%

Question 14

In an RC parallel circuit, E_T = 480 V, R = 50 k Ω , and X_C = 47 k Ω . What is the reactive power?

A) 4.90 VARs
B) 5.36 VARs
C) 6.38 VARs
D) 7.61 VARs

Question 15

In an RC parallel circuit, E_T = 120 V, R = 420 Ω , and X_C = 330 Ω . What is Z?

A) 140 Ω
B) 230 Ω
C) 259.62 Ω
D) 534.13 Ω

Question 16

In an RC parallel circuit, E_T = 120 V, R = 40 Ω , and X_C = 30 Ω . What is the power factor?

A) 60%
B) 80%
C) 100%
D) 133%

Question 17

In an RC parallel circuit, the current flow through the capacitor will lead both the resistive current and applied voltage by _____.

A) 60 °
B) 90 °
C) 180 °
D) 360 °

Question 18

In an RC parallel circuit, E_T = 120 V, R = 47 k Ω , and X_C = 27 k Ω . What is I_T?

A) 4.62 mA
B) 5.13 mA
C) 6.44 mA
D) 7.55 mA

Question 19

In an RC parallel circuit, the supply voltage is 120 V, 60 Hz. The resistance is 40 Ω and the capacitive reactance is 30 Ω . What is the capacitance of the capacitor?

A) 37.89 μ F
B) 53.05 μ F
C) 66.31 μ F
D) 88.42 μ F

Question 20

In an RC parallel circuit, the voltage across the resistor and the voltage across the capacitor are _____.

A) less than 90 ° out of phase with the resistor voltage lagging
B) in phase
C) less than 90 ° out of phase with the resistor voltage leading
D) 180 ° out of phase

Question 21

In an RC parallel circuit, E_T = 208 V, R = 68 k Ω , and X_C = 56 k Ω . What is the phase angle (angle theta)?

A) 39.47 °
B) 40 °
C) 44.56 °
D) 50.53 °

Question 22

In an RC parallel circuit, E_T = 240 V, R = 30 Ω , and X_C = 60 Ω . What is the phase angle (angle theta)?

A) 26.57 °
B) 30 °
C) 63.43 °
D) 90 °