MHT CET Physics question
A metal rod of cross-section area is suspended vertically from one end has a length 0.4 m at C. Now the rod is cooled upto C, but prevented from contracting by attaching a mass 'm' at the lower end. The value of 'm' is (, coefficient of linear expansion , ) [MHT-CET 2023]
Answer: (A)
Solution
Thermal stress , so N
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