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Two spheres of same material have radii ...

Two spheres of same material have radii 1 m and 4m and temperature 4000K and 2000K respectively. The energy radiated per second by the first sphere is

A

greater than that by the second

B

less than that by the second

C

equal in both cases

D

the information is incomplete to draw any conclusion

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The correct Answer is:
C
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BINA LIBRARY-THERMAL PROPERTIES OF MATTER -EXERCISE
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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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  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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