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    2.

    A wire of length L{\rm{L}}, area of cross section A{\rm{A}} is hanging from a fixed support. The length of the wire changes to L1{{\rm{L}}_{\rm{1}}} when mass M{\rm{M}} is suspended from its free end. The expression for Young’s modulus is:

    A

    MgL1AL\frac{{{\rm{Mg}}{{\rm{L}}_{\rm{1}}}}}{{{\rm{AL}}}}

    B

    Mg(L1L)AL\frac{{{\rm{Mg}}\,{\rm{(}}{{\rm{L}}_{\rm{1}}}{\rm{ - L)}}}}{{{\rm{AL}}}}

    C

    MgLAL1\frac{{{\rm{MgL}}}}{{{\rm{A}}{{\rm{L}}_{\rm{1}}}}}

    D

    MgLA(L1L)\frac{{{\rm{MgL}}}}{{{\rm{A}}\,{\rm{(}}{{\rm{L}}_{\rm{1}}} - {\rm{L)}}}}

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