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

`Delta`l versus `1/l`

B

`Delta` versus `1/l^2`

C

`Delta` versus `l^2`

D

`Delta`lversus l

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