Question 1

-Refer to Figure 4-2a. Voltage from C to ground is 100 V. What is the probable cause of failure?

Accepted Answer

A) open between E and D 
B) short between A and B 
C) open between A and B 
D) voltage reading is normal 
A) open between E and D 
B) short between A and B 
C) open between A and B 
D) voltage reading is normal A

Question 2

When 50 V is applied to four series resistors,   flows.     what is the value of

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)    C

Question 3

If five equal resistors dissipate a total of 10 W in a series circuit, how much power does each resistor dissipate?

Accepted Answer

A) 50 W 
B) 10 W 
C) 2 W 
D) 5 W 
A) 50 W 
B) 10 W 
C) 2 W 
D) 5 W C

Question 4

Two resistors are in series across a 12 V source. If each resistor equals   what is the voltage across each resistor?

Accepted Answer

A) 9 V 
B) 12 V 
C) 3 V 
D) 6 V 
A) 9 V 
B) 12 V 
C) 3 V 
D) 6 V

Question 5

Three resistors are connected in series across a 60 V source. If   then what is the voltage drop across   ?

Accepted Answer

A) 14.3 V 
B) 45.7 V 
C) 19 V 
D) 26.7 V 
A) 14.3 V 
B) 45.7 V 
C) 19 V 
D) 26.7 V

Question 6

Voltage sources in series increase both voltage and current capacity.

Accepted Answer

A) True 
 B)False

Question 7

-Refer to Figure 4-2a. Voltage B to ground is less than normal. What could be the cause of failure?

Accepted Answer

A) short between A and B 
B) open between B and C 
C) open between C and D 
D) short between E and D 
A) short between A and B 
B) open between B and C 
C) open between C and D 
D) short between E and D

Question 8

According to Kirchhoffʹs Voltage Law, the sum of the individual voltage drops in a series circuit
equals the source voltage.

Accepted Answer

A) True 
 B)False

Question 9

If a   resistor are connected in series across a 9 V battery, the current equals ________.

Accepted Answer

A) 36.3 mA 
B) 327 mA 
C) 22.3 mA 
D) 27.6 A 
A) 36.3 mA 
B) 327 mA 
C) 22.3 mA 
D) 27.6 A

Question 10

-How much voltage is dropped across R2 and R3 in Figure

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 11

-What is the easiest, most practical measurement performed during troubleshooting?

Accepted Answer

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

Question 12

If 12 V and -19 V sources are connected so their total voltage is -7 V, they are ________.

Accepted Answer

A) series opposing 
B) series aiding 
C) connected dangerously 
D) in parallel 
A) series opposing 
B) series aiding 
C) connected dangerously 
D) in parallel

Question 13

-Calculate   in Figure

Accepted Answer

A) 0.0256 mW 
B) 0.256 mW 
C) 25.6 mW 
D) 2.56 mW 
A) 0.0256 mW 
B) 0.256 mW 
C) 25.6 mW 
D) 2.56 mW

Question 14

-  opens in Figure 4-1, the total power dissipated ________.

Accepted Answer

A) increases to maximum 
B) will depend upon the source voltage 
C) decreases to zero 
D) remains the same 
A) increases to maximum 
B) will depend upon the source voltage 
C) decreases to zero 
D) remains the same

Question 15

If   and they are wired in series across a 20 V source, what is VR1 and   ?

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 16

-Refer to Figure 4-2a. The resistor between points E and D looks charred. What most likely would cause this?

Accepted Answer

A) short between A and D 
B) open A and the power supply 
C) short between A and B 
D) Any of these could cause this problem. 
A) short between A and D 
B) open A and the power supply 
C) short between A and B 
D) Any of these could cause this problem.

Question 17

An open in a series circuit results in:

Accepted Answer

A) no current flow. 
B) source voltage appearing across the open. 
C) no power dissipation. 
D) all of these. 
A) no current flow. 
B) source voltage appearing across the open. 
C) no power dissipation. 
D) all of these.

Question 18

If   and   resistors are wired in series, the total resistance is

Accepted Answer

A) True 
 B)False

Question 19

In a series circuit, the largest amount of power is dissipated by:

Accepted Answer

A) the largest resistor. 
B) the smallest resistor. 
C) the first resistor. 
D) any resistor, since the current is the same throughout the circuit. 
A) the largest resistor. 
B) the smallest resistor. 
C) the first resistor. 
D) any resistor, since the current is the same throughout the circuit.

Question 20

In a series circuit, total power   is calculated as:

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Exam 4: Energy and Power

-Refer to Figure 4-2a. Voltage from C to ground is 100 V. What is the probable cause of failure?

When 50 V is applied to four series resistors, flows. what is the value of

If five equal resistors dissipate a total of 10 W in a series circuit, how much power does each resistor dissipate?

Two resistors are in series across a 12 V source. If each resistor equals what is the voltage across each resistor?

Three resistors are connected in series across a 60 V source. If then what is the voltage drop across ?

Voltage sources in series increase both voltage and current capacity.

-Refer to Figure 4-2a. Voltage B to ground is less than normal. What could be the cause of failure?

According to Kirchhoffʹs Voltage Law, the sum of the individual voltage drops in a series circuit equals the source voltage.

If a resistor are connected in series across a 9 V battery, the current equals ________.

-How much voltage is dropped across R2 and R3 in Figure

-What is the easiest, most practical measurement performed during troubleshooting?

If 12 V and -19 V sources are connected so their total voltage is -7 V, they are ________.

-Calculate in Figure

- opens in Figure 4-1, the total power dissipated ________.

If and they are wired in series across a 20 V source, what is VR1 and ?

-Refer to Figure 4-2a. The resistor between points E and D looks charred. What most likely would cause this?

An open in a series circuit results in:

If and resistors are wired in series, the total resistance is

In a series circuit, the largest amount of power is dissipated by:

In a series circuit, total power is calculated as:

Quantities and Units

Voltage, Current, and Resistance

Ohms Law

Series Circuits

Parallel Circuits

Series-Parallel Circuits

Circuit Theorems and Conversions

Branch, Loop, and Node Analyses

Magnetism and Electromagnetism

Introduction to Alternating Current and Voltage

Capacitors

Inductors

Transformers

RC Circuits

RL Circuits

RlC Circuits and Resonance

Passive Filters

Circuit Theorems in Ac Analysis

Time Response of Reactive Circuits

Three-Phase Systems in Power Applications

Filters