JEE Main Physics question

Statement 1: Young's modulus for a perfectly plastic body is zero.

Statement 2: For a perfectly plastic body, the restoring force is zero.

(A)Assertion is True, Reason is True; Reason is correct explanation for AssertionCorrect
(B)Assertion is True, Reason is True; Reason is not correct explanation for Assertion
(C)Assertion is True, Reason is False
(D)Assertion is False, Reason is True

Answer: (A)

Solution

A perfectly plastic body offers no restoring force at all when deformed (Statement 2, true); since stress is proportional to the restoring force per

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Question ID VK-154992