A spherical conductor $A$ lies inside a hollow spherical conductor $B$ . Charges $Q_{1} a n d Q_{2}$ are given to $A a n d B$ respectively.

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Charge - $Q_{1}$ will appear on the inner surface of B.

$C h a r g e Q_{1} + Q_{2} w i l l a p p e a r o n t h e o u t e r s u r f a c e o f B .$

$C h a r g e Q_{2} w i l l a p p e a r o n t h e o u t e r s u r f a c e o f B .$

$C h a r g e Q_{1} w i l l a p p e a r o n t h e o u t e r s u r f a c e o f A .$

answer is A, C, D.

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Detailed Solution

All charges are uniformly distributed over the surface of the conducting sphere. When sphere $A$ lies inside the hollow sphere B, the charge $Q_{1}$ is distributed on the outer surface of sphere A but inside the hollow sphere ,charge is zero. So $- Q_{1}$ charge appears on the inner surface of $B$ and $Q_{1} + Q_{2}$ is distributed over the outer surface of $B$ .