MHT CET 2022 Physics question
The coefficient of linear expansion of brass and steel rod are '' and '' respectively. Lengths of brass and steel rods are '' and '' respectively. If is maintained same at all temperatures, which one of the following relations is correct?
Answer: (A)
Solution
After a temperature rise the lengths become and . The difference stays constant at all temperatures only if both rods expand by the same amount: $α_1Δ
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