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Electricity and...

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  • Question 1
    1 / -0

    Most of the electricity carrying wires along the roads do not have a plastic covering like the wires used at homes. But why is there no substantial loss of energy?

  • Question 2
    1 / -0

    What is the filament of an electric bulb '   usually made up of?

  • Question 3
    1 / -0

    Why are the electric wires used in homes usually covered with materials like plastic or rubber?

  • Question 4
    1 / -0

    Why is a switch used in a circuit?

  • Question 5
    1 / -0

    Which of the following does NOT conduct electricity?

  • Question 6
    1 / -0

    Which of the following energy conversions take place in a torch?

  • Question 7
    1 / -0

    It why is tungsten used as a filament in electric bulbs?

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