The value of Young's modulus of a perfectly rigid body is

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Less than 1

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Zero

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Infinite

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Solution

The correct option is D Infinite
For perfectly rigid body the condition is that there should not be any elongation.
$(∴ Δ L = 0)$ for any value of force.
We know,
$\frac{F L}{A . Δ L} = Y$
If we put $Δ L = 0$
We get $Y$ as $\infty$

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Young’s modulus of a perfectly rigid body is

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