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Energy and Power - General Questions
Energy and Power - True or False

  1. A 6 V battery is connected to a 300 load. Under these conditions, it is rated at 40 Ah. How long can it supply current to the load?

    2. A.
    1 h
    B.
    200 h
    C.
    2,000 h
    D.
    10 h

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  2. In 40 kW, there are

    3. A.
    0.4 mW
    B.
    40,000 W
    C.
    400 W
    D.
    5,000 W

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  3. If you used 600 W of power for 60 h, you have used

    4. A.
    36 kWh
    B.
    3.6 kWh
    C.
    10 kWh
    D.
    1 kWh

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  4. If it takes 400 ms to use 12,000 J of energy, the power is

    5. A.
    30 kW
    B.
    30 W
    C.
    3 W
    D.
    300 kW

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  5. How many watt-hours represent 65 W used for 18 h?

    6. A.
    11.7 Wh
    B.
    1,170 Wh
    C.
    11,700 Wh
    D.
    117,000 Wh

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  6. For 12 V and 40 mA, the power is

    7. A.
    480 mW
    B.
    0.480 W
    C.
    480,000 µW
    D.
    all of the above

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  7. A 220 resistor dissipates 3 W. The voltage is

    8. A.
    73.3 V
    B.
    2.5 V
    C.
    25.7 V
    D.
    257 V

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  8. A 3.3 k resistor dissipates 0.25 W. The current is

    9. A.
    8.7 mA
    B.
    87 mA
    C.
    8.7 µA
    D.
    8.7 A

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  9. A half-watt is equal to how many milliwatts?

    10. A.
    5,000 mW
    B.
    5 mW
    C.
    500 mW
    D.
    50 mW

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  10. Three hundred joules of energy are consumed in 15 s. The power is

    11. A.
    2,000 W
    B.
    2 W
    C.
    20 W
    D.
    200 W

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