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The temperature of a wire of length 1 m and area of cross-section 1 cm2 is increased from 00C to 1000C. If the rod is not allowed to increase in length, the force required will be (α = 10-5 /0C and Y = 1011 Nm-2)

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a

103 N

b

104 N

c

105 N

d

109 N

answer is B.

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Detailed Solution

Force developed, F=YAα(Δθ)=1011×10−4×10−5×100=104N

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The temperature of a wire of length 1 m and area of cross-section 1 cm2 is increased from 00C to 1000C. If the rod is not allowed to increase in length, the force required will be (α = 10-5 /0C and Y = 1011 Nm-2)