1.

elongationof0.1%inAnsection 10^-6m^2 causes a tension of 100N. Y forthe wire isa wire of cross-

Answer»

Let the length be l.

Change in Length,∆l= 0.1% of l=0.001l

Area of cross section,A= 10⁻⁶m²

Tension, T=100N

Y=F.l/(A.∆l)= 100×l/(10⁻⁶×0.001l)

=> Y=10¹¹ N/m²



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