Deck 6: Parallel Circuits

Question 1

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?

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

Answer 1

D

Question 2

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?

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

Answer 2

C

Question 3

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

Answer 3

True

Question 4

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.

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

Question 5

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

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

Question 6

Most electrical circuits in homes are connected in parallel.

Question 7

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

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

Question 8

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

A)
B)
C)
D)

Question 9

In a parallel circuit, ____.

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

Question 10

Parallel circuits are circuits that ____.

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 11

The total resistance of a parallel circuit is always ____.

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

Question 12

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?

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

Question 13

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

Question 14

What is the reciprocal formula?

A)
B)
C)
D)

Question 15

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

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

Question 16

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

Question 17

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

A)
B)
C)
D)

Question 18

An increase of resistance must cause an increase of current.

Question 19

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

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

Question 20

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

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