JEE Main Physics question

Statement 1: Two identical springs of steel and copper are equally stretched. More work will be done on the steel spring than on the copper spring.

Statement 2: Steel is more elastic than copper.

(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

Being more elastic, steel has a larger Young's modulus and hence a larger force constant than copper for identical dimensions (Statement 2, true).

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Question ID VK-154996