Q.1
A 470 Ω resistor, a 220 Ω resistor, and a 100 Ω resistor are all in parallel. The total resistance is approximately
Q.2

The total resistance for two resistors in parallel is equal to the sum of the two resistors.

  • True
  • False
Q.3

The sum of the currents into a junction is equal to the sum of the currents out of that junction.

  • True
  • False
Q.4

The total current divides among parallel resistors in a manner directly proportional to the resistance values.

  • True
  • False
Q.5

When an open circuit occurs in a parallel branch, the total resistance decreases.

  • True
  • False
Q.6

A parallel circuit acts as a current divider.

  • True
  • False
Q.7

Addition of resistors in parallel increases total resistance and decreases total current.

  • True
  • False
Q.8

Parallel resistors are connected between the same two points.

  • True
  • False
Q.9

If there are a total ofmA into a parallel circuit consisting of three branches, and two of the branch currents aremA andmA, the third branch current is

  • 50 mA
  • 70 mA
  • 120 mA
  • 40 mA
Q.10

Total power in a parallel circuit is found by adding up the power of all the individual resistors.

  • True
  • False
Q.11

In a parallel circuit, the branch with the lowest resistance has the most current.

  • True
  • False
Q.12

The number of current paths equals the number of resistors in parallel.

  • True
  • False
Q.13

Three lights are connected in parallel across avolt source. If one light burns out,

  • the remaining two will glow dimmer
  • the remaining two will glow brighter
  • the remaining two will not light
  • the remaining two will glow with the same brightness as before
Q.14

The power dissipation in each of four parallel branches is 1.2 W. The total power dissipation is

  • 1.2 W
  • 4.8 W
  • 0.3 W
  • 12 W
Q.15

The power dissipation in each of four parallel branches is 1.2 W. The total power dissipation is

  • 1.2 W
  • 4.8 W
  • 0.3 W
  • 12 W
Q.16

The power dissipation in each of four parallel branches is 1.2 W. The total power dissipation is

  • 1.2 W
  • 4.8 W
  • 0.3 W
  • 12 W
Q.17

There is a total ofmA of current into four parallel resistors. The currents through three of the resistors aremA,mA, andmA. The current through the fourth resistor is

  • 490 mA
  • 800 mA
  • 310 mA
  • 0 A
Q.18

In a certain three-branch parallel circuit, R1 hasmA through it, R2 hasmA through it, and R3 hasmA through it. After measuring a total ofmA, you can say that

  • R3 is open
  • R1 is open
  • R2 is open
  • the circuit is operating properly
Q.19

Five light bulbs are connected in parallel acrossV. Each bulb is rated atW. The current through each bulb is approximately

  • 2.2 A
  • 137 mA
  • 1.8 A
  • 9.09 A
Q.20

Four resistors are connected in parallel. Fifteen mA flows through resistor R. If the second resistor is 2R, the third resistor 3R, and the fourth resistor 4R, the total current in the circuit is

  • 60 mA
  • 15 mA
  • 135 mA
  • 31.25 mA
Q.21

Five light bulbs are connected in parallel acrossV. Each bulb is rated atW. The current through each bulb is approximately

  • 2.2 A
  • 137 mA
  • 1.8 A
  • 9.09 A
Q.22

A sudden increase in the total current into a parallel circuit may indicate

  • a drop in source voltage
  • an open resistor
  • an increase in source voltage
  • either a drop in source voltage or an open resistor
Q.23

If one of the resistors in a parallel circuit is removed, the total resistance

  • decreases
  • increases
  • remains the same
  • doubles
Q.24

The following currents are measured in the same direction in a three-branch parallel circuit:mA,mA, andmA. The value of the current into the junction of these branches is

  • 200 mA
  • 540 mA
  • 1.24 A
  • 900 mA
Q.25

The currents into a junction flow along two paths. One current is 4 A and the other is 3 A. The total current out of the junction is

  • 1 A
  • 7 A
  • unknown
  • the larger of the two
Q.26

Four 8 speakers are connected in parallel to the output of an audio amplifier. If the maximum voltage to the speakers isV, the amplifier must be able to deliver to the speakers

  • 18 W
  • 1.5 W
  • 48 W
  • 72 W
Q.27

The currents into a junction flow along two paths. One current is 4 A and the other is 3 A. The total current out of the junction is

  • 1 A
  • 7 A
  • unknown
  • the larger of the two
Q.28

In a five-branch parallel circuit, there aremA of current in each branch. If one of the branches opens, the current in each of the other four branches is

  • 48 mA
  • 12 mA
  • 0 A
  • 3 mA
Q.29

When an additional resistor is connected across an existing parallel circuit, the total resistance

  • remains the same
  • decreases by the value of the added resistor
  • increases by the value of the added resistor
  • decreases
Q.30

Four 8 speakers are connected in parallel to the output of an audio amplifier. If the maximum voltage to the speakers isV, the amplifier must be able to deliver to the speakers

  • 18 W
  • 1.5 W
  • 48 W
  • 72 W
0 h : 0 m : 1 s