small drop of the same size are charged to V volt each .if n such drops coalesec to from a single last drop .what will be its potential???
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small drop of the same size are charged to V volt each .if n such drops coalesec to from a single last drop .what will be its potential???
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Let potential f 1 drop = Kq/r =V
Volume of n drops = volume of bigger drop
n 4/3 pi (r)^3 = 4/3 pi (R)^3
Therefore , R = ( (n)^1/3) r
also charge remains conserved
charge on 1 drop = q
charge on big drop containing n drops = (nq)
Therefore potential on big drop = K (nq)/ ((n)^1/3)r
=(( n)^2/3) Kq/r
= (( n)^2/3) V