Q.1

The joule is a unit of energy.

  • True
  • False
Q.2

ForV andmA, the power is

  • 480 mW
  • 0.480 W
  • 480,000 µW
  • all of the above
Q.3

A given power supply is capable of providing 6 A for 3.5 h. Its ampere-hour rating is

  • 0.58 Ah
  • 2.1 Ah
  • 21 Ah
  • 58 Ah
Q.4

The watt is the unit of power.

  • True
  • False
Q.5

Power rating is related to resistance value.

  • True
  • False
Q.6

The power rating of a carbon-composition resistor that is to handle up to 1.2 W should be

  • 2 W
  • 1 W
  • 5 W
  • 0.5 W
Q.7

A resistor normally opens when it burns out.

  • True
  • False
Q.8

The power rating of a resistor determines the minimum power that it can handle safely.

  • True
  • False
Q.9

At the end of aday period, your utility bill shows that you have usedkWh. What is your average daily power?

  • 1.286 kWh
  • 12.85 kWh
  • 535 kWh
  • 252 kWh
Q.10

When the pointer of an analog ohmmeter reads close to zero, the resistor being measured is

  • overheated
  • shorted
  • open
  • reversed
Q.11

InkW, there are

  • 0.4 mW
  • 40,000 W
  • 400 W
  • 5,000 W
Q.12

How much continuous current can be drawn from aAh battery forh?

  • 42.8 A
  • 428 A
  • 4.28 A
  • 4.2 A
Q.13

Energy equals power multiplied by time.

  • True
  • False
Q.14

A battery is one type of power supply that converts chemical energy into electrical energy.

  • True
  • False
Q.15

A 3.3 k resistor dissipates 0.W. The current is

  • 8.7 mA
  • 87 mA
  • 8.7 µA
  • 8.7 A
Q.16

At the end of aday period, your utility bill shows that you have usedkWh. What is your average daily power?

  • 1.286 kWh
  • 12.85 kWh
  • 535 kWh
  • 252 kWh
Q.17

When the pointer of an analog ohmmeter reads close to zero, the resistor being measured is

  • overheated
  • shorted
  • open
  • reversed
Q.18

InkW, there are

  • 0.4 mW
  • 40,000 W
  • 400 W
  • 5,000 W
Q.19

The capacity of a battery is measured in milliamperes.

  • True
  • False
Q.20

Energy is equal to power multiplied by voltage.

  • True
  • False
Q.21

A half-watt is equal to how many milliwatts?

  • 5,000 mW
  • 5 mW
  • 500 mW
  • 50 mW
Q.22

A half-watt is equal to how many milliwatts?

  • 5,000 mW
  • 5 mW
  • 500 mW
  • 50 mW
Q.23

In 0.W, there are

  • 25 kW
  • 0.00025 mW
  • 2,500 µW
  • 25 mW
Q.24

If you usedW of power forh, you have used

  • 36 kWh
  • 3.6 kWh
  • 10 kWh
  • 1 kWh
Q.25

Three hundred joules of energy are consumed ins. The power is

  • 2,000 W
  • 2 W
  • 20 W
  • 200 W
Q.26

If you usedW of power forh, you have used

  • 1.3 kWh
  • 13.3 kWh
  • 1.2 kWh
  • 12 kWh
Q.27

A certain appliance usesW. If it is allowed to run continuously fordays, how many kilowatt-hours of energy does it consume?

  • 20.16 kWh
  • 201.6 kWh
  • 2.01 kWh
  • 8.4 kWh
Q.28

If it takesms to use 12,J of energy, the power is

  • 30 kW
  • 30 W
  • 3 W
  • 300 kW
Q.29

If you usedW of power forh, you have used

  • 1.3 kWh
  • 13.3 kWh
  • 1.2 kWh
  • 12 kWh
Q.30

A resistor is connected across the terminals of a 3 V battery. The power dissipation of the resistor is

  • 132 mW
  • 13.2 mW
  • 22.6 mW
  • 226 mW
0 h : 0 m : 1 s