64 small drops of water having same charge and same radius are combined to form one big drop. The ratio of capacitance of big drop to small drop is:
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
C
Let the radius of each small drop is r and the radius of big drop is R.
So, the volume of 64 small drops 
the volume of big drop
i.e. 
… (i)
Now, the capacitance of small drop
… (ii)
and the capacitance of big drop is
… (iii)
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