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  1. If a copper wire is increased to double its length, its resistance will become

    2. A.

     Four times
    B.

     One–fourth
    C.

     Double
    D.

     Half

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    Answer : Option A

    Explanation :

    When the wire is stretched to double the length , the area of cross section gets reduced to half. So when the wire is stretched, the resistance multiplies by four times.

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