A large number of water drops, each of radius 
, combine to have a drop of radius R. If the surface tension is T and mechanical equivalent of heat is J, the rise in heat energy per unit volume will be:
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
JEE Main 2021
R is the radius of bigger drop. is the radius of n water drops. Water drops are combined to make bigger drop.
So, Volume o [n drops 
volume of bigger drop
(Change in surface area) 
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