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A hot body will radiate maximum energy i...

A hot body will radiate maximum energy if its surface is

A

white and polished

B

blank poslished

C

white and rough

D

black and rough

Text Solution

Verified by Experts

The correct Answer is:
D
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CP SINGH-HEAT TRANSFER-Exercises
  1. Three objects coloured black, gray and white can withstand hostile con...

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  2. An ideal Black-body at room temperature is thrown into a furnace. It i...

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  3. A hot body will radiate maximum energy if its surface is

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  4. A black body does not (i) emit radiation (ii) absorb radiation ...

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  5. The thermal radiation emited by a body is proportional to T^(n) where ...

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  6. A spherical black body with a radius of 12 cm radiates 450 watt power ...

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  7. A black body at 227^(@)C radiates heat at the rate of 7 cal cm^(-2) s...

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  8. Two spherical black bodies of radii R(1) and R(2) and with surface tem...

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  9. Two bodies A and B having equal surface areas are maintained at temper...

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  10. Two spheres of radii in the ratio 1 : 2 and densities in the ratio 2 :...

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  11. A piece of charcoal and a piece of shining steel of the same surface a...

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  12. In a dark room with ambient temperature T(0), a black body is kept at ...

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  13. Three very large plates of same area are kept parrallel and close to e...

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  14. A solid at temperature T(1) is kept in an evacuated chamber at tempera...

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  15. A system S receives heat continuously from an electric heater of power...

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  16. A spherical black body of radius r radiates power P, and its rate of c...

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  17. The temperature of an isolated black body falls from T(1) to T(2) in t...

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  18. A solid cube and a solid sphere of the same material have equal surfac...

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  19. A solide sphere and a hollow sphere of the same material and of equal ...

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  20. A sphere at temperature 600 K is placed in an enviroment to temperatur...

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