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Q.

A material has poisons ratio 0.2. If a uniform rod of it suffers a longitudinal strain of 5×10−2 , then the percentage increase in its volume is

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a

0%

b

10%

c

20%

d

3%

answer is D.

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Detailed Solution

ΔVV×100=(1−2σ)Δℓℓ×100 =(1−2×0.2)(5×10−2×100) =0.6×5  = 3%
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