A ball having a charge -100 e is placed at the center of a hollow spherical shell which has a net charge of -20 e. What is the charge on the shell's outer surface?
A
+80 e
B
-20 e
C
D
Text Solution
Verified by ExpertsThe correct answer is:
D
When charged ball is placed at the center of another ball, it induces opposite charge on the inner surface by the induction. Further same nature of charge will be induced on the outer surface of the shell. Hence the total charge on the surface of the shell is 
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