A small sphere of radius r falls from rest in a viscous liquid. As a result, heat is produced due to viscous force. The rate of production of heat when the sphere attains its terminal velocity, is proportional to [NEET 2018]
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
Rate of heat produced, 
Where, F is the viscous force and 
is the terminal velocity.
As, 
… (i)
From the relation for terminal velocity,
we get
… (ii)
From Eq. (ii), we can rewrite Eq. (i) as
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