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Temperature difference of 120ºC is maintained between two ends of a uniform rod AB of length 2L. Another bent rod PQ, of same cross-section as AB and length 3L 2 , is connected across AB (See figure). In steady state, temperature difference between P and Q will be close to : L 4 A L 2 B P L Q

1. 45 ºC
2. 75 ºC
3. 35 ºC
4. 60 ºC

Correct answer: 45 ºC

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