Heat and Thermal ExpansionHard

Question

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

Options

A.ᐃI versus
B.ᐃI versus l2
C.ᐃI versus
D.ᐃI versus l

Solution

V = Al, Y = ⇒ ᐃl =
⇒ ᐃl ∝ l2

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