Question 1

If one of the resistors opens in a parallel circuit, total resistance of the circuit will increase.

Accepted Answer

A) True 
 B)False

Question 2

Figure 6-4
-Given the circuit in Figure 6-4, find the current through R1.

Accepted Answer

A)  24.8 mA 
B)  0.25 A 
C)  0.024 A 
D)  0.187 A 
A)  24.8 mA 
B)  0.25 A 
C)  0.024 A 
D)  0.187 A

Question 3

Each resistor in a parallel circuit demands a current I = V/R), and is independent of all other resistors in parallel with it.

Accepted Answer

A) True 
 B)False

Question 4

If 10 A of current entered a two branch junction, and 2 A flowed into Branch "A", how much current will flow in branch "B"?

Accepted Answer

A)  12 A 
B)  10A 
C)  5 A 
D)  8 A 
A)  12 A 
B)  10A 
C)  5 A 
D)  8 A

Question 5

The total resistance of two resistors in parallel is equal to the:

Accepted Answer

A)  value of one branch resistor divided by the sum of their R values. 
B)  product of their R values divided by the sum of the two resistors. 
C)  source voltage divided by any of the two branch resistors. 
D)  sum divided by the product of the two resistors. 
A)  value of one branch resistor divided by the sum of their R values. 
B)  product of their R values divided by the sum of the two resistors. 
C)  source voltage divided by any of the two branch resistors. 
D)  sum divided by the product of the two resistors.

Question 6

When two or more components are connected across the same voltage source, they are in parallel.

Accepted Answer

A) True 
 B)False

Question 7

What devices can be used to find shorts in a circuit?

Accepted Answer

A)  pulser 
B)  potentiometer 
C)  current tracer 
D)  both A and C 
E)  none of the above 
A)  pulser 
B)  potentiometer 
C)  current tracer 
D)  both A and C 
E)  none of the above

Question 8

The total resistance of a parallel circuit:

Accepted Answer

A)  equals the sum of the total circuit conductance. 
B)  is always greater than the largest branch resistance. 
C)  equals the sum of all the branch resistances. 
D)  is the inverse of the total circuit conductance. 
A)  equals the sum of the total circuit conductance. 
B)  is always greater than the largest branch resistance. 
C)  equals the sum of all the branch resistances. 
D)  is the inverse of the total circuit conductance.

Question 9

If two lamps, L1 and L2, are connected in parallel and L1 opens, what would happen?

Accepted Answer

A)  Both lamps would be on 
B)  L1 would be on and L2 would be off. 
C)  Both lamps would be off 
D)  L1 would be off and L2 would be on. 
A)  Both lamps would be on 
B)  L1 would be on and L2 would be off. 
C)  Both lamps would be off 
D)  L1 would be off and L2 would be on.

Question 10

Figure 6-4
-Given the circuit in Figure 6-4, find the current through R2.

Accepted Answer

A)  0.187 A 
B)  0.25 A 
C)  0.125 A 
D)  24.8 mA 
A)  0.187 A 
B)  0.25 A 
C)  0.125 A 
D)  24.8 mA

Question 11

While checking a circuit for current flow, it is noted that R1 current has increased; since it is in parallel with R2, the problem is:

Accepted Answer

A)  R1 is shorted 
B)  R1 is open 
C)  R2 is shorted 
D)  R2 is open 
A)  R1 is shorted 
B)  R1 is open 
C)  R2 is shorted 
D)  R2 is open

Question 12

In a parallel resistive circuit:

Accepted Answer

A)  there is more than one current path between two points. 
B)  the total branch power exceeds the source power. 
C)  the voltage applied divides between the branches. 
D)  the total circuit conductance is less than the smallest branch conductance. 
A)  there is more than one current path between two points. 
B)  the total branch power exceeds the source power. 
C)  the voltage applied divides between the branches. 
D)  the total circuit conductance is less than the smallest branch conductance.

Question 13

Circuit analysis should reveal that the largest resistance in a parallel circuit has the:

Accepted Answer

A)  least voltage 
B)  least current 
C)  most current 
D)  most voltage 
A)  least voltage 
B)  least current 
C)  most current 
D)  most voltage

Question 14

Figure 6-7
-Given the circuit in Figure 6-7, find the total power.

Accepted Answer

A)  0.125 W 
B)  310 mW 
C)  187 mW 
D)  0.035 W 
A)  0.125 W 
B)  310 mW 
C)  187 mW 
D)  0.035 W

Question 15

-Given the circuit in Figure , what is the resistance value of R2?

Accepted Answer

A)  220 Ω 
B)  20 kΩ 
C)  1.5 kΩ 
D)  1 kΩ 
A)  220 Ω 
B)  20 kΩ 
C)  1.5 kΩ 
D)  1 kΩ

Question 16

Four eight-ohm speakers are connected in parallel to an audio power amplifier. The amplifier can supply a maximum drive output voltage of fifteen volts. How much audio power must the amplifier be able to deliver to the speakers when outputting this maximum voltage?

Accepted Answer

A)  225 W 
B)  112.5 W 
C)  56 W 
D)  28 W 
A)  225 W 
B)  112.5 W 
C)  56 W 
D)  28 W

Question 17

-Given the circuit in Figure , what is the total equivalent) resistance of the circuit?

Accepted Answer

A)  100 Ω 
B)  600 Ω 
C)  300 Ω/3 
D)  100 Ω × 3 
E)  A and C are correct. 
A)  100 Ω 
B)  600 Ω 
C)  300 Ω/3 
D)  100 Ω × 3 
E)  A and C are correct.

Question 18

To find one branch current of two resistors in shunt, the:

Accepted Answer

A)  total current is multiplied by the ratio of the other branch resistor, divided by the sum of the branch resistances. 
B)  product of both is divided by their sum. 
C)  product of both is divided by their difference. 
D)  total current is divided by the ratio of the other branch resistor divided by their sum. 
A)  total current is multiplied by the ratio of the other branch resistor, divided by the sum of the branch resistances. 
B)  product of both is divided by their sum. 
C)  product of both is divided by their difference. 
D)  total current is divided by the ratio of the other branch resistor divided by their sum.

Question 19

A parallel circuit is also used as a current divider.

Accepted Answer

A) True 
 B)False

Question 20

When parallel resistors are of three different values, the smallest resistor will dissipate the greatest amount of power.

Accepted Answer

A) True 
 B)False

Exam 6: Parallel Circuits

If one of the resistors opens in a parallel circuit, total resistance of the circuit will increase.

Figure 6-4 -Given the circuit in Figure 6-4, find the current through R1.

Each resistor in a parallel circuit demands a current I = V/R), and is independent of all other resistors in parallel with it.

If 10 A of current entered a two branch junction, and 2 A flowed into Branch "A", how much current will flow in branch "B"?

The total resistance of two resistors in parallel is equal to the:

When two or more components are connected across the same voltage source, they are in parallel.

What devices can be used to find shorts in a circuit?

The total resistance of a parallel circuit:

If two lamps, L1 and L2, are connected in parallel and L1 opens, what would happen?

Figure 6-4 -Given the circuit in Figure 6-4, find the current through R2.

While checking a circuit for current flow, it is noted that R1 current has increased; since it is in parallel with R2, the problem is:

In a parallel resistive circuit:

Circuit analysis should reveal that the largest resistance in a parallel circuit has the:

Figure 6-7 -Given the circuit in Figure 6-7, find the total power.

-Given the circuit in Figure , what is the resistance value of R2?

Four eight-ohm speakers are connected in parallel to an audio power amplifier. The amplifier can supply a maximum drive output voltage of fifteen volts. How much audio power must the amplifier be able to deliver to the speakers when outputting this maximum voltage?

-Given the circuit in Figure , what is the total equivalent) resistance of the circuit?

To find one branch current of two resistors in shunt, the:

A parallel circuit is also used as a current divider.

When parallel resistors are of three different values, the smallest resistor will dissipate the greatest amount of power.

Quantities and Units

Voltage, Current, and Resistance

Ohms Law

Energy and Power

Series 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