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

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$16.8 J / s$

$4.0 J / s$

$44.0 J / s$

$8.0 J / s$

answer is C.

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Detailed Solution

As the temperature difference $Δ T = 10 ° C$ as well as the thermal resistance is same for both cases, so the thermal current or rate of heat flow will also be the same for both cases.

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