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in Physics by (65.8k points)

Assertion : Identical spring of steel and copper are equally stretched more will be done on the steel spring. 

Reason : Steel is more elastic than copper.

(A) If both assertion and reason are true and reason is the correct explanation of the assertion. 

(B) If both assertion and reason are true but reason is not the correct explanation of the assertion. 

(C) If assertion is true but reason is false. 

(D) If assertion and reason both are false. 

1 Answer

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Best answer

Correct option: (A)

Explanation:

workdone = (1/2) × stress × strain

WD = (1/2) × Y × (strain)2 

As steel is more elastic than copper more work has to be done in order to stretch the steel.

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