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Question

In determination of young modulus of elasticity of wire, a force is applied and extension is recorded. Initial length of wire is '1 m'. The curve between extension and stress is depicted then Young's modulus of wire will be K × 109 Nm2, where K is .

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Solution

We know that,

Youngs modulus = Y = SressStrain

Y=FAΔll

Y=4000×1032×1031
Y=4000×1032×103=2×109 Nm2.

Thus, K = 2.


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