Young's modulus of Perfectly elastic body is

Finite value

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Zero

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One

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Infinite value

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Solution

The correct option is B Infinite value
Young's modulus for a perfectly elastic body is infinity. For an elastic body, there is no deformation on the application of load. Therefore, the strain is equal to zero. The denominator becomes zero which leads to the infinite value of Young's modulus.

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Young’s modulus of a perfectly rigid body is

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