A 1m diameter spherical cavity is maintained at a uniform temperature – McqOptions

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1.	A 1m diameter spherical cavity is maintained at a uniform temperature of 500 K. The emissivity of the material of the sphere is 0.5; One 10 mm diameter hole is drilled. The maximum rate of radiant energy streaming through the hole will be
A.	2782 W
B.	0.139 W
C.	1392 W
D.	0.278 W
Answer» C. 1392 W

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