NEET Questions Solved


A steel wire of 1 m long and  cross section area is hang from rigid end. When weight of 1kg is hung from it then change in length will be (given Y=2×1011N/m2)

(a)   0.5 mm                              (b)   0.25 mm

(c)   0.05 mm                            (d)   5 mm

(c) l=MgLYA=1×10×12×1011×10-6=0.05mm

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