SSC Sample Paper SSC CHSL (10+2) Sample Test Paper-6

  • question_answer
    If a resistive wire is elongated, its resistance

    A)  decreases                     

    B)  remains constant

    C)  increases                      

    D)  All of the above

    Correct Answer: C

    Solution :

     Poisson strain is denned as the negative ratio of the strain in the traverse direction (caused by the contraction of the bar's diameter) to the strain in the longitudinal direction. As the length in-creases and the cross sectional area decreases, the electrical resistance of the wire also rises.


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