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20 August, 09:36

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

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  1. 20 August, 09:47
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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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