4 3 8. A mild steel wire of length 2l meter cross-sectional area A m2 is fixed horizontally between two pillars A small mass m kg is suspended from the mid point of the wire. If extension in wire are within elastic limit. Then depression at the mid point of wire will be 1/3 ( Mg YA (2) Mg IA 1/3 MglYA Mg 2YA

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