Question 1

The total power for a circuit can be found by taking the sum of the power used by each component.

Accepted Answer

A) True 
 B)False  True

Question 2

The total resistance of a parallel circuit is always ____.

Accepted Answer

A)  equal to the resistance of the highest-value resistor 
B)  equal to the resistance of the lowest-value resistor 
C)  greater than the resistance of the highest-value resistor 
D)  less than the resistance of the lowest-value resistor 
A)  equal to the resistance of the highest-value resistor 
B)  equal to the resistance of the lowest-value resistor 
C)  greater than the resistance of the highest-value resistor 
D)  less than the resistance of the lowest-value resistor D

Question 3

If a parallel circuit has two resistors, with values of 30 ohms and 60 ohms, what is the total resistance in ohms?

Accepted Answer

A)  20 
B)  30 
C)  60 
D)  90 
A)  20 
B)  30 
C)  60 
D)  90 A

Question 4

Most electrical circuits in homes are connected in parallel.

Accepted Answer

A) True 
 B)False

Question 5

Four resistors having values of 10 ohms, 20 ohms, 25 ohms, and 100 ohms are connected in parallel. What is the total resistance in ohms?

Accepted Answer

A)  5 
B)  10 
C)  20 
D)  50 
A)  5 
B)  10 
C)  20 
D)  50

Question 6

The voltage drop across any branch of a parallel circuit is ____ the applied voltage.

Accepted Answer

A)  a multiple of 
B)  not related to 
C)  the same as 
D)  inversely proportional to 
A)  a multiple of 
B)  not related to 
C)  the same as 
D)  inversely proportional to

Question 7

When all resistors are of equal value, the total resistance is equal to ____.

Accepted Answer

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

Question 8

Assume that three resistors, each having a value of 24 ohms, are connected in parallel. What is the total resistance in ohms?

Accepted Answer

A)  3 
B)  8 
C)  24 
D)  72 
A)  3 
B)  8 
C)  24 
D)  72

Question 9

The reciprocal of any number is that number divided into ____.

Accepted Answer

A)  zero 
B)  one 
C)  two 
D)  ten 
A)  zero 
B)  one 
C)  two 
D)  ten

Question 10

One of the methods used to determine resistance in a parallel circuit is called the sum over product formula.

Accepted Answer

A) True 
 B)False

Question 11

What is the reciprocal formula?

Accepted Answer

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

Question 12

Three resistors are connected in parallel. Resistor R1 is producing 0.075 W of heat, R2 is producing 0.45 W of heat, and R3 is producing 0.225 W of heat. What is the total power output of the circuit?

Accepted Answer

A)  0.25 W 
B)  0.50 W 
C)  0.75 W 
D)  1.0 W 
A)  0.25 W 
B)  0.50 W 
C)  0.75 W 
D)  1.0 W

Question 13

In a parallel circuit, ____.

Accepted Answer

A)  current adds 
B)  resistance adds 
C)  current multiplies 
D)  resistance multiplies 
A)  current adds 
B)  resistance adds 
C)  current multiplies 
D)  resistance multiplies

Question 14

If a parallel circuit has two resistors, R1 and R2, what is the total resistance?

Accepted Answer

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

Question 15

Three resistors are connected in parallel. Two of the resistors have a value of 900 ohms and 1800 ohms. The total resistance of the circuit is 300 ohms. What is the value of the remaining resistor?

Accepted Answer

A)  150 ohms 
B)  300 ohms 
C)  400 ohms 
D)  600 ohms 
A)  150 ohms 
B)  300 ohms 
C)  400 ohms 
D)  600 ohms

Question 16

Before the invention of handheld calculators, the slide rule was often employed to help with the mathematical calculations in electrical work.

Accepted Answer

A) True 
 B)False

Question 17

An increase of resistance must cause an increase of current.

Accepted Answer

A) True 
 B)False

Question 18

Parallel circuits are circuits that ____.

Accepted Answer

A)  have more than one path for current flow 
B)  have only one path for current flow 
C)  are rarely used in residential wiring 
D)  do not have voltage drops 
A)  have more than one path for current flow 
B)  have only one path for current flow 
C)  are rarely used in residential wiring 
D)  do not have voltage drops

Question 19

Once the voltage drop across each part of the circuit is known and the resistance is known, the current flow through each branch can be determined using ____ Law.

Accepted Answer

A)  Seebeck's 
B)  Faraday's 
C)  Ohm's 
D)  Lenz's 
A)  Seebeck's 
B)  Faraday's 
C)  Ohm's 
D)  Lenz's

Question 20

Three resistors having values of 150 ohms, 300 ohms, and 100 ohms are connected in parallel. What is the total resistance in ohms?

Accepted Answer

A)  50 
B)  100 
C)  150 
D)  300 
A)  50 
B)  100 
C)  150 
D)  300

Exam 6: Parallel Circuits

The total power for a circuit can be found by taking the sum of the power used by each component.

The total resistance of a parallel circuit is always ____.

If a parallel circuit has two resistors, with values of 30 ohms and 60 ohms, what is the total resistance in ohms?

Most electrical circuits in homes are connected in parallel.

Four resistors having values of 10 ohms, 20 ohms, 25 ohms, and 100 ohms are connected in parallel. What is the total resistance in ohms?

The voltage drop across any branch of a parallel circuit is ____ the applied voltage.

When all resistors are of equal value, the total resistance is equal to ____.

Assume that three resistors, each having a value of 24 ohms, are connected in parallel. What is the total resistance in ohms?

The reciprocal of any number is that number divided into ____.

One of the methods used to determine resistance in a parallel circuit is called the sum over product formula.

What is the reciprocal formula?

Three resistors are connected in parallel. Resistor R1 is producing 0.075 W of heat, R2 is producing 0.45 W of heat, and R3 is producing 0.225 W of heat. What is the total power output of the circuit?

In a parallel circuit, ____.

If a parallel circuit has two resistors, R1 and R2, what is the total resistance?

Three resistors are connected in parallel. Two of the resistors have a value of 900 ohms and 1800 ohms. The total resistance of the circuit is 300 ohms. What is the value of the remaining resistor?

Before the invention of handheld calculators, the slide rule was often employed to help with the mathematical calculations in electrical work.

An increase of resistance must cause an increase of current.

Parallel circuits are circuits that ____.

Once the voltage drop across each part of the circuit is known and the resistance is known, the current flow through each branch can be determined using ____ Law.

Three resistors having values of 150 ohms, 300 ohms, and 100 ohms are connected in parallel. What is the total resistance in ohms?

Atomic Structure

Electrical Quantities, Ohms Law, and Resistors

Electrical Sources and Static Charges

Magnetism

Series Circuits

Combination Circuits

Measuring Instruments

Alternating Current

Alternating Current Loads

Capacitive Loads

Three-Phase Circuits

Transformers

Three-Phase Transformers

Electrical Services

General Wiring Practices Part 1: Receptacle and Switch Connections

General Wiring Practices Part 2: Protection Circuits, Dimmers, and Chimes

Three-Phase Motors

Single-Phase Motors

Schematics and Wiring Diagrams

Motor Installation

Filters