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Q. |
A sphere of radius 'R1' is enclosed in a sphere of radius 'R2'. The view (or shape) factor for radiative heat transfer of the outer sphere with respect to the inner sphere is |
A. | 0 |
B. | R2/(R1+R2) |
C. | 1 |
D. | (R1/R2) 2 |
Answer» B. R2/(R1+R2) |
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