MHT CET Physics question
A metal rod of length L and cross-sectional area A is heated through T°C. What is the force required to prevent the expansion of the rod lengthwise? (Y = Young's modulus of material of the rod, α = coefficient of linear expansion of the rod) [MHT-CET 2023]
Answer: (B)
Solution
The heated length is and it must be compressed back to , so strain and force
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