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Thermodynamic Processes

Assertion A :...

Question

Assertion (A) : Young's modulus for a perfectly plastic body is zero.
Reason (R) : For a perfectly plastic body, restoring force is zero.

A

Both assertion and reason are true and the reason is correct explanation of the assertion

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B

Both assertion and reason are true, but reason is not correct explanation of the assertion

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C

Assertion is true, but the reason is false

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D

Assertion is false, but the reason is true

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Solution

The correct option is C Both assertion and reason are true and the reason is correct explanation of the assertion
Young's Modulus= (restoring force per unit area)/(elongation of wire/length of wire)
now for a plastic body the restoring force is zero and it ultimately makes the Young's modulus zero.
hence both assertion and reason are true

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