Deck 7: Parallel Circuits

Question 1

A parallel circuit is composed of two 60 Ω resistors. What is the total resistance?

A) 1 Ω
B) 3600 Ω
C) 120 Ω
D) 30 Ω

Answer 1

D

Question 2

A method for finding total resistance of parallel resistors is .

A) product over sum
B) reciprocal formula
C) resistors of equal value
D) all of the above

Answer 2

D

Question 3

Most devices such as light receptacles in homes and office buildings are connected in circuits.

Answer 3

parallel

Question 4

A three-branch parallel circuit has a total resistance of 385.83 Ω. Two of the resistors are 680 Ω and 1500 Ω. What is the value of the third resistor?

A) 2180 Ω
B) 2200 Ω
C) 467.89 Ω
D) 246.16 Ω

Question 5

In a parallel circuit, the voltage across each branch must be .

Question 6

A three branch parallel circuit has resistors of 27 Ω, 56 Ω, and 15 Ω. What is the total resistance?

A) 9.64 Ω
B) 98 Ω
C) 18.22 Ω
D) 8.23 Ω

Question 7

The term "load" refers to the amount of in a circuit branch.

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

Question 8

To calculate current flow through any branch of a circuit by substituting the values of IX and RX for the branch values when total circuit current and the resistance are known, use the formula.

Question 9

A two-branch parallel circuit has a 30 Ω and a 15 Ω resistor. What is the total resistance?

A) 2 Ω
B) 10 Ω
C) 45 Ω
D) 15 Ω

Question 10

A parallel circuit composed of a 10 Ω and a 22 Ω resistor. It has a voltage of 60 V. What is the current in the 10 Ω resistor?

A) 6 A
B) 5 A
C) 2.73 A
D) 1.88 A

Question 11

In a parallel circuit, the total current flow is equal to the of the currents through all the branches.

A) difference
B) average
C) sum
D) quotient

Question 12

The amount of current flowing through each resistor is directly proportional to its resistance.

Question 13

A parallel circuit composed of a 150 Ω and a 270 Ω resistor has a voltage of 120 V. What is the current in the 150 Ω resistor?

A) 0.29 A
B) 0.8 A
C) 1 A
D) 0.44 A

Question 14

Parallel circuits are also referred to as .

A) current dividers
B) current multipliers
C) voltage dividers
D) voltage multipliers

Question 15

Circuits that have more than one path for current flow are circuits.

A) parallel
B) series
C) combination

Question 16

Imagine a water system with a holding tank, pump, and return lines. What would happen to the resistance to flow if a return path is added to the system?

A) It increases
B) It lessens
C) It stays the same

Question 17

The voltage drop across any branch of a parallel circuit is the same as voltage.

Question 18

In a parallel circuit, the total resistance is value resistor.

A) larger than the lowest
B) less than the lowest
C) equal to the largest
D) equal to the lowest

Question 19

An increase in , not resistance, results in an increase of load.

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