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A cylindrical rod of heat capacity 120 J...

A cylindrical rod of heat capacity `120 J//K` in a room temperature `27^(@)C` is heated internally by heater of power `250W`,
The steady state temperature attained by the rod is `37^(@)C`. Fin the following:
(a) The initial rate of increse in temperature
(b) The steady state rate of emission of radiant heat.
If the heater is switched off, find
(c) The initial rate of decrease is temperature
(d) The rate of decrease in temperature of the cylinder when its temperature falls to `31^(@)C` and
(e) The maximum amount of heat lost by the cylinder

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The correct Answer is:
250 W
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MOTION-HEAT - 1-EXERCISE -3 (Level - I) Subjective | JEE Advanced
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  8. One end of a steel rod (K =42 J//m-s-^(@)C) of length 1.0m is lept in ...

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  9. A rod CD of thermal resistance 5.0KW(-1) is joined at the middle of an...

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  14. An electric heater of surface area 200cm^2 emits radiant energy of 60 ...

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  15. If a body takes 6 minutes to cool from 80°C to 70°C, how long will it ...

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  16. A cylindrical rod of heat capacity 120 J//K in a room temperature 27^(...

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  17. A 100W bulb has tungsten filament of total length 1.0m and radius 4xx1...

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  18. A copper sphere is suspended in an evacuated chamber maintained at 300...

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