Electricity and Magnetism

Electricity and Magnetism

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Electricity and Magnetism
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  1. Transformer is used








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    Transformer is used to step up or step down AC voltage.

    Correct Option: D

    Transformer is used to step up or step down AC voltage.

  1. Tube light is filled with








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    Tube light is filled with mercuric oxide and argon gas.

    Correct Option: D

    Tube light is filled with mercuric oxide and argon gas.

  1. A 100 watt bulb is kept switched ON for four hours. The units of electrical energy consumed is








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    One unit of electrical energy = 1 kwh.
    = 1 kilo watt hour
    = 100/1000 kilo watt x 4 hour
    = 0.4 unit

    Correct Option: D

    One unit of electrical energy = 1 kwh.
    = 1 kilo watt hour
    = 100/1000 kilo watt x 4 hour
    = 0.4 unit

  1. What type of electromagnetic radiation is used in the remote control of a television ?








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    Infrared is used in remote control of a television.

    Correct Option: A

    Infrared is used in remote control of a television.

  1. The filament of an electric bulb is made of








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    Electric bulb filament is a made of tungsten.

    Correct Option: D

    Electric bulb filament is a made of tungsten.