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19 April, 08:06

A 1.5m wire carries a 4 A current when a potential difference of 78 V is applied. What is the resistance of the wire? ohms

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  1. 19 April, 09:57
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    Applying ohms law

    v=ir

    78=4r

    78/4=r

    19.5=r

    hence resistance is 19.5
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