Questions
Two insulated charged conducting spheres of radii 20 cm and 15 cm respectively and having an equal charge of 10C are connected by a copper wire and then they are separated. Then
detailed solution
Correct option is C
After redistribution, charges on them will be different, but they will acquire common potential i.e. kQ1r1=kQ2r2⇒Q1Q2=r1r2As σ=Q4πr2⇒σ1σ2=Q1Q2×r22r12⇒σ1σ2=r2r1⇒σ∝1ri.e. surface charge density on smaller sphere will be more.Talk to our academic expert!
Similar Questions
Eight small drops, each of radius r and having same charge q are combined to form a big drop. The ratio between the potentials of the bigger drop and the smaller drop is
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