Q 1126801771.     Two wires of the same material and length but diameters in the ratio `1 : 2` are stretched by the same force. The elastic potential energy per unit volume for the two wires when stretched by the same force will be in the ratio

A

`1:1`

B

`2:1`

C

` 4:1`

D

` 16:1`

HINT

stress is `sigma=F/A=F/(pid^2)`
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