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Q.

 A rod of length 2m rests on smooth horizontal floor. If the rod is heated from 0°C to 20°C. Find the longitudinal strain developed?  (α=5×10-5/°C)

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a

2×10-3

b

10-3

c

Zero

d

None

answer is C.

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Detailed Solution

We known that, when rod is freely expand, stress produce=0

Question Image

stress ∝strain

so strain =0

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 A rod of length 2m rests on smooth horizontal floor. If the rod is heated from 0°C to 20°C. Find the longitudinal strain developed?  (α=5×10-5/°C)