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?

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

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

Copper of fixed volume 'V' is drawn into wire of length 'l'. When this wires is subjected to a constant force 'F', the extenstion produced in the wire is ' Delta l' which of the following graphs is a straight line?