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Charge Behaviour

Three concent...

Question

Three concentric conducting spherical shells carry charges as follows; + Q on the inner shell, - 2 Q on the middle shell and - 5 Q on the outer shell. The charge on the inner surface of the outermost shell is

A

Zero

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B

+ Q

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C

-2Q

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D

-3Q

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Solution

The correct option is B + Q

$+ Q$ (inner shell)
$- 2 Q$ (for middle shell)
$- 5 Q$ (outer shell)
Given charge of the inner surface of outer most shell.
$2 Q - Q = Q$

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