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Questions  

A metal sphere A of radius r1 charged to a potential ϕ1 is enveloped by a thin walled conducting spherical shell B of radius r2 Then ϕ2 of the sphere A after it is connected by a thin conducting wire to the shell B will be :

a
ϕ1r1r2
b
ϕ1r2r1
c
ϕ11-r2r1
d
ϕ1r1r2r1+r2

detailed solution

Correct option is A

ϕ1=KQr1⇒KQ=r1ϕ1All charges moves to outer sphere after connectionϕ2=KQr2=r1r2ϕ1

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Similar Questions

Two spherical shells are as shown in figure.

Let r be the distance of a point from their common centre.  Then, match the following columns and mark the correct choice from the given codes.

 Column-I Column-II
i.Electric field for r < R1p.is constant for q2 and vary for q1
ii.Electric potential for r < R1q.is zero for q2 and vary for q1
iii.Electric potential for R1 < r <R2r.is constant
iv.Electric field for R1 < r <R2s.is zero

Codes:


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