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Copper of fixed volume V is drawn into wire of length l. When this wire is subjected

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 Δl. Which of the following graphs is a straight line?

Options

(a) Δl versus 1/l
(b) Δl versus l²
(c) Δl versus 1/l²
(d) Δl versus l

Correct Answer:

Δl versus l²

Explanation:

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