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9 November, 11:14

What will the wire's resistance be if it is stretched to twice its original length without changing the volume of the wire?

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  1. 9 November, 14:16
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    The resistance of a wire is:

    R = ρL/A, where ρ is the resistivity of the material, L is the length of the wire and A is the cross sectional area. If the length is doubled, the resistance of the wire will double.
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