Question 1

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

Accepted Answer

A)  ET × I 
B)  ER × I 
C)  EC × I 
A)  ET × I 
B)  ER × I 
C)  EC × I A

Question 2

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?

Accepted Answer

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

Question 3

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

Accepted Answer

A)  VA 
B)  W 
C)  VARs 
A)  VA 
B)  W 
C)  VARs A

Question 4

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

Accepted Answer

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

Question 5

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?

Accepted Answer

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

Question 6

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?

Accepted Answer

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

Question 7

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?

Accepted Answer

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

Question 8

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

Accepted Answer

A) True 
 B)False

Question 9

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

Accepted Answer

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

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?

Accepted Answer

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

Accepted Answer

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

Question 12

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

Accepted Answer

A) True 
 B)False

Question 13

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

Accepted Answer

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

Question 14

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

Accepted Answer

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

Question 15

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

Accepted Answer

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

Question 16

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?

Accepted Answer

A)  25 Ω 
B)  95 Ω 
C)  125 Ω 
D)  130 Ω 
A)  25 Ω 
B)  95 Ω 
C)  125 Ω 
D)  130 Ω

Question 17

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?

Accepted Answer

A)  390 Ω 
B)  900 Ω 
C)  1000 Ω 
D)  1290 Ω 
A)  390 Ω 
B)  900 Ω 
C)  1000 Ω 
D)  1290 Ω

Question 18

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

Accepted Answer

A)  168.2 VA 
B)  691.2 VA 
C)  921.6 VA 
D)  1152 VA 
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 = 40 Ω, and XC = 30 Ω. What is EC?

Accepted Answer

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

Question 20

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?

Accepted Answer

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

Exam 22: Resistive-Capacitive Series Circuits

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

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?

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

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

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 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 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?

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

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

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?

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

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

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

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

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

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 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?

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

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

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?

Atomic Structure

Electrical Quantities and Ohms Law

Static Electricity

Magnetism

Resistors

Series Circuits

Parallel Circuits

Combination Circuits

Kirchhoffs Law, Thevenins and Nortons Theorems

Measuring Instruments

Using Wire Tables and Determining Conductor Sizes

Conduction in Liquids and Gases

Batteries and Other Sources of Electricity

Magnetic Induction

Basic Trigonometry and Vectors

Alternating Current

Inductance in Alternating Current Circuits

Resistive-Inductive Series Circuits

Resistive-Inductive Parallel Circuits

Capacitors

Capacitance in Alternating Current Circuits

Resistive-Capacitive Parallel Circuits

Resistive-Inductive-Capacitive Series Circuits

Resistive-Inductive-Capacitive Parallel Circuits

Filters

Three-Phase Circuits

Single-Phase Transformers

Three-Phase Transformers

Direct Current Generators

Direct Current Motors

Three-Phase Alternators

Three-Phase Motors

Single-Phase Motors

Harmonics and their Effects on Electrical Systems

Filters