JEE Main Physics question

Statement 1: The stretching of a coil is determined by its shear modulus

Statement 2: Shear modulus changes only the shape of a body keeping its dimensions unchanged

(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

When a helical spring/coil is stretched along its axis, the wire itself is twisted (sheared) rather than being simply elongated, so the stiffness of the coil is governed

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Question ID VK-155188