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Q.

A fixed volume of iron is drawn into a wire of length L. The extension produced in this wire by constant force F is proportional to

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a

$\frac{1}{L^{2}}$

b

$\frac{1}{L}$

c

$L^{2}$

d

$L$

answer is C.

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Detailed Solution

$e l o n g a t i o n e = \frac{F L}{A Y} = \frac{F L^{2}}{A L Y} = \frac{F L^{2}}{V Y}$

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