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A rod of height H having mass mu is hang...

A rod of height H having mass `mu` is hangingvertically from ceiling. Find expansion at end of rod. Given young's modulus Y, cross section A.

A

` (mu g H)/(AY)`

B

` (mu g H)/(2AY)`

C

` (mu g H)/(4AY)`

D

` (2 mu g H)/(AY)`

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JEE MAINS PREVIOUS YEAR-JEE MAIN 2021-PHYSICS SECTION B
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