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Question

A rod is fixed between two points at 20. The coefficient of linear expansion of material of rod is 1.1×105C and Young's modulus is 1.2×1011Nm2. Find the stress developed in the rod if temperature of rod becomes 10C

A
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B
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C
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D
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Solution

The correct option is A
Thermal stress FA=YαΔθ=1.2×1011×1.1×105×(2010)=1.32×107Nm2

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