Copper of fixed volume V is drawn into w...

Copper of fixed volume `V` is drawn into wire of length l. When this wire is subjected to a constant force F, the extension produced in the wire is `trianglel`. Which of the following graphs is a straight line?

A

`(Deltal)"versis 1/l`

B

`(Deltal"versus"l^(2)`

C

`Deltal"versus" (1)/(l^(2))`

D

`Deltal"versus"l`

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