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A black body radiates energy at the rate...

A black body radiates energy at the rate of `1 xx 10^(5) J // s xx m` at temperature of `227 ^(@)C`, The temperature to which it must be heated so that it radiates energy at rate of `1 xx 10^(9) J//sm`, is

A

5000 K

B

`5000^@C`

C

500 K

D

`500^@C`

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SL ARORA-Thermal Properties of Matter-Exercise
  1. Unit of Stefan's constant is

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  2. Two bodies are at temperature 27^(@) and 927^(@)C. The heat energy rad...

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  3. A black body radiates energy at the rate of 1 xx 10^(5) J // s xx m at...

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  4. Temperature of a black body increases from 327^(@)C to 927^(@)C, the ...

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  5. Two identical metal balls at temperature 200^(@)C and 400^(@)C kept in...

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  6. A body at a temperature of 727^(@)C and having surface area 5 cm^(2), ...

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  7. The surface temperature of the sun is 'T'K and the solar constant for ...

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  8. A piece of blue glass heated to a high temperature and a piece of red ...

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  9. Which of the following graphs correctly represents the relation betwe...

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  10. How is the temperature of stars determined by

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  11. The wavelength of radiation emitted by a body depends upon

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  12. Temperature of two stars are in the ratio 3 : 2 . If wavelenghth for t...

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  13. If wavelength at 4500 K is lambdam, the wavelength at 1500 K is

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  14. A black body at 200 K is found to emit maximum energy at a wavelength ...

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  15. If sigma is Stefan's constant and b is Wien's constant, then the dimen...

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  16. of a body is the measure of the average kinetic energy of its molecule...

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  17. The amount of heat energy required to raise the temperature of 1 gram ...

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  18. At what temperature is the Fahrenheit scale reading equal to (a) twi...

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  19. At what temperature the Fahrenheit and Celsius scales of temperature g...

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  20. A faulty thermometer reads 5^@ C melting ice and 99^@ C in steam. Find...

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