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A spherical black body with radius 12 cm...

A spherical black body with radius 12 cm radiates 640 w power at 500 K. If the radius is halved and the temperature doubled, the power radiated in watts would be

A

160W

B

409W

C

2560W

D

640W

Text Solution

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The correct Answer is:
C
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FIITJEE-HEAT AND TEMPERATURE-ASSIGNMENT PROBLEMS (OBJECTIVE) (LEVEL-I)
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  8. The velocities of three molecules are 3v, 4v and 5v. Calculate their r...

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  9. If the average kinetic energy of gas molecule at 27^(@)C is 6.21xx10^(...

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  10. A substance of mass M kg requires a power input of P wants to remain i...

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  11. The coefficient of linear expansion of a rod is alpha and its length i...

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  12. Two idential container joined by a small pipe initially contain the sa...

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  13. A cyclic process ABCD is shown in the figure P-V diagram. Which of the...

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  14. A spherical black body with radius 12 cm radiates 640 w power at 500 K...

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  17. Two perfect gases at absolute temperature T(1) and T(2) are mixed. The...

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  18. A pendulum clock keeps correct time at 0^(@)C. Its mean coefficient of...

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  19. Two straight metallic strips each of thickness t and length l are rive...

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  20. The radius of a ring is R and its coefficient of linear expansion is a...

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