Thermal Properties of Matter - Result Question 17
17. The two ends of a metal rod are maintained at temperatures $100^{\circ} C$ and $110^{\circ} C$. The rate of heat flow in the rod is found to be $4.0 J / s$. If the ends are maintained at temperatures $200^{\circ} C$ and $210^{\circ} C$, the rate of heat flow will be [2015]
(a) $16.8 J / s$
(b) $8.0 J / s$
(c) $4.0 J / s$
(d) $44.0 J / s$
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Answer:
Correct Answer: 17. (c)
Solution:
- (c) As the temperature difference $\Delta T=10^{\circ} C$ as well as the thermal resistance is same for both the cases, so thermal current or rate of heat flow will also be same for both the cases.
