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JEE Advanced Model Paper 16 with solutions for online practice

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Question : 27

Total: 69

A spherical black body has a radius R and steady surface temperature T, heat sourcesensure the heat evolution at a constant rate and distributed uniformly over its volume.What would be the new steady surface temperature of the object if the radius isdecreased by half ? Assume surrounding to be at absolute zero and heat evolution ratethrough unit volume remain same.

4√2 T
4√
1
2
T
√2 T
√
1
2
T

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