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On stretching a wire, the elastic energy...

On stretching a wire, the elastic energy stored pre unit volume is

A

`(1)/(2)((F)/(A))((dl)/(l))`

B

`(1)/(2) .(FA)/(l)`

C

`(1)/(2).(F)/(A)`

D

`(1)/(2).Fl`

Text Solution

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The correct Answer is:
A
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