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The radii of two spheres mode of the sam...

The radii of two spheres mode of the same material are 1m and 4m respectively.If their temperatures are 4000K and 2000K respectively, then the ratio of the amount of heat radiated per second is.

A

1:1

B

16:1

C

4:1

D

1:9

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The correct Answer is:
A
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