ElectrostaticsHard
Question
A and B are two conducting concentric spherical shells. A is given a charge Q while B is uncharged. If now B is earthed as shown in figure.Then:
Options
A.The charge appearing on inner surface of B is -Q
B.The field inside and outside A is zero.
C.The field between A and B is not zero.
D.The charge appearing on outer surface of B is zero.
Solution
(i) Due to earthing
Let total charge on B is q.
VB = 0 ∴
or q = - Q.(ii) ∴ All charge q = − Q
appears on inner surface of B due to induction
⇒ Charge on outer surface of B = 0
⇒ Field between A and B due to B = 0
Field between A and B due to A 0
Net field between A and B 0.
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