Two metallic spheres 
and 
are made of same material have same smoothness but the weight of 
is 8 times that of 
. If the two are heated to same temperature and left to cool, then the ratio of rate of cooling of 
to that of 
is
Text Solution
Verified by ExpertsThe correct answer is:
C
We have 
From stefan's law, the rate of heat radiation from an object is given by
……(i)
But, 
…..(ii)
From Eqs. (i) and (ii), we get
From Eqs. (iii) and (iv), we get.
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