MHT CET 2023 Physics question
The difference in length between two rods A and B is 60 cm at all temperatures. If = 18 x 10/ °C and =27 x 10/°C, the lengths of the two rods are
Answer: (B)
Solution
The difference in lengths stays 60 cm at all temperatures only if both rods expand by the same amount: , so . Also . Writing :
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