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A hot body will radiate heat most rapidl...

A hot body will radiate heat most rapidly ,if its surface is

A

White and polished

B

white and rough

C

black and polished

D

black and rough

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The correct Answer is:
D
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BINA LIBRARY-THERMAL PROPERTIES OF MATTER -EXERCISE
  1. The ventilation of building is necessary for

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  2. The melting point of an alloy is usually

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  3. What is the effect of increase of pressure on melting point of ice?

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  4. Boiling point of water

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  5. A marble floor appears cold than a cemented floor, because marble has

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  6. Air is heated by

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  7. A perfect black body

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  8. The essence of kirchoff's law is that

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  9. The total radiation emitted by a perfectly black body is proportional ...

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  10. Conversion of heat into electrical energy can be achieved by Accroding...

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  11. Accroding to newton's law of cooling (provided the difference of tempe...

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  12. An ideal material for making cooking vessels must have

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  13. A hot body will radiate heat most rapidly ,if its surface is

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  14. If the temperature of sun is doubled,the rate of energy received on ea...

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  15. which of the following cylindrical rods will conduct most heat,when th...

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  16. Two spheres of same material have radii 1 m and 4m and temperature 400...

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  17. A black body at a high temperature T radiates energy at the rate of E....

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  18. A spherical black body with radius 12 cm radiates 450 W power at 500K,...

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  19. A sphere ,a cubeand a thin circular plate,all made of the same meterie...

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  20. A polished metal plate with a rough black spot on it is heated to abou...

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