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24 October, 14:22

Find the potential difference required to pass a current of 0.2A in a wire of resistance 20 ohm

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  1. 24 October, 14:32
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    4V

    Explanation:

    Ohm's law gives that V = I R, that is, potential difference = current x resistance.

    We have the current and resistance given to us in the question, so multiply these together to get the potential difference: 0.2 x 20 = 4V
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