Questions
n small drops of same size are charged to V volt each. If they coalesce to form a single large drop, then its potential will be
a
V/n
b
V n
c
V n13
d
V n23
detailed solution
Correct option is D
Let R be the radius of big drop and r, radius of small drop.∴ 43πR3=n43πr3 or R=r(n)1/3Total charge on big drop = n qPotential of bigger drop=14πε0×nqr(n)1/3=14πε0×qr×n2/3=Vn2/3Talk to our academic expert!
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