ElectrostaticsHard
Question
There are four concentric shells A, B, C and D of radii a, 2a 3a and 4a respectively. Shells B and D are given charges +q and -q respectively. Shell C is now earthed. The potential difference VA - VC is :
Options
A.
B.
C.
D.
Solution
Potential at C =
= 0 ⇒ q′ = - 
Potential at A =
Hence VA - VC =
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