The two ends of a metal rod are maintained at temperatures 100ºC and 110ºC. The rate of heat flow in the rod is found to be 4.0 J/s. If the ends are maintained at temperatures 200ºC and 210ºC, the ra…

Question

The two ends of a metal rod are maintained at temperatures 100ºC and 110ºC. The rate of heat flow in the rod is found to be 4.0 J/s. If the ends are maintained at temperatures 200ºC and 210ºC, the rate of heat flow will be:

Accepted Answer

Correct answer: C. (c) The two ends of a rod are maintained at temperatures 100^ C and 110^ C. Given, T_1=110^ C-100^ C=10^ C dQ_1 dt=4Js^-1 T_2=210-200=10^ C dQ_2 dt= ? As the rate of heat flow is directly proportional to the temperature difference and the temperature difference in both cases is same, i.e. 10^ C. So, the same rate of heat will flow in the second case. Hence, dQ_2 dt=4 Js^-1 So, if the ends of the rod are maintained at temperatures 200^ C and 210^ C, then the rate of heat flow will remain same, i.e. 4 Js^-1.

$The two ends of a metal rod are maintained at temperatures 100ºC and 110ºC. The rate of heat flow in the rod is found to be 4.0 J/s. If the ends are maintained at temperatures 200ºC and 210ºC, the rate of heat flow will be:$

Solution

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