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17 September, 22:01

Which of the following will cause an induced current in a coil of wire?

the constant field of the earth passing through the coil

a magnet resting near the coil

a magnet being moved into or out of the coil

a wire carrying a constant current near the coil

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  1. 17 September, 22:12
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    The answer is b.)

    Explanation:

    The following are given as causes for an induced current in a coil of wire:

    a.) a magnet resting near the coil.

    - This not true as there will be no change in flux. Only a change in flux

    will lead to the production of an induced current.

    b.) a magnet being moved into or out of the coil.

    - This is TRUE. This will lead to a change in flux which will lead to the

    production of an induced current.

    c.) constant current flowing through a wire placed near the coil.

    - This is not true as there will not be any change in flux.
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