If the work done in stretching a wire by 1 mm is 2J, then work necessary for stretching another wire of same material but with double radius of corss-section and half the length by 1 mm isA. 4B. 8C. 2D. 16

If the work done in stretching a wire by 1 mm is 2J, then work necessa

1.	If the work done in stretching a wire by 1 mm is 2J, then work necessary for stretching another wire of same material but with double radius of corss-section and half the length by 1 mm isA. 4B. 8C. 2D. 16
Answer» Correct Answer - D `w_(1)=(1)/(2) F_(1)l_(1) and w_(2) =(1)/(2)F_(2)l_(2)` `(w_(2))/(w_(1))=(F_(2))/(F_(1)) xx ((A_(2))/(A_(1)))^(2)xx(L_(1))/(L_(2))`

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If the work done in stretching a wire by 1 mm is 2J, then work necessary for stretching another wire of same material but with double radius of corss-section and half the length by 1 mm isA. 4B. 8C. 2D. 16

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