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NEET 2015
Exam
NEET
Year
2015
Subject
Physics
Chapter
Thermal Properties of Matter

NEET 2015 · Physics · Thermal Properties of Matter

The two ends of a metal rod are maintained at temperatures 100 ° C...

The two ends of a metal rod are maintained at temperatures 100°C100 ° C and 110°C110 ° C . The rate of heat flow in the rod is found to be 4.0J s−14.0{\text{J s}}^{- 1} . If the ends are maintained at temperatures 200°C200 ° C and 210°C210 ° C , the rate of heat flow will be:

Options

  1. A44.0J s−144.0{\text{J s}}^{- 1}
  2. B16.8J s−116 .8 {\text{J s}}^{- 1}
  3. C8.0J s−18 .0 {\text{J s}}^{- 1}
  4. D4.0J s−14 .0 {\text{J s}}^{- 1}

Correct answer

D. 4.0J s−14 .0 {\text{J s}}^{- 1}

Step-by-step solution

In case I, temperature difference between the ends of rod is =110−100=10oC= 110 - 100 = {10}^{o}C

In case II, temperature difference between the ends of rod is =210−200=10oC= 210 - 200 = {10}^{o}C

Hence, in both the case temperature difference are same i.e. 10oC{10}^{o}C

∴∴ Rate of heat flow is also 4Js−14J{s}^{- 1} in both the cases.
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