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Physical Quantities

Young's modul...

Question

Young's modulus of a wire of length L and radius r is $Y (N / m^{2})$ . If the length is reduced to $\frac{L}{2}$ and radius to $\frac{r}{2}$ , its Young's modulus will be:

A

\frac{Y}{2}

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B

Y

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C

2Y

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D

4Y

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Solution

The correct option is B Y
Value of modulus of elasticity are independent of the magnitude of the stress and strain. It depend only on the nature of material of body.

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