The fractional increase in volume of a wire of circular cross section if its longitudinal strain is 1% σ=0.3

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Q.

The fractional increase in volume of a wire of circular cross section if its longitudinal strain is 1% $(σ = 0.3)$

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a

0.0004

b

4

c

0.4

d

0.004

answer is B.

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Detailed Solution

$\frac{△ v}{v} = \frac{△ L}{L} (1 - 2 σ)$ substitute values we get answer

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