Physics-
General
Easy

Question

Both question (a) and (b) refer to the system of charges as shown in the figure. A spherical shell with an inner radius 'a' and an outer radius 'b' is made of conducting material. A point charge +Q is placed at the centre of the spherical shell and a total charge – q is placed on the shell.
a) Charge – q is distributed on the surfaces as

  1. – Q on the inner surface, – q on outer surface    
  2. – Q on the inner surface, – q + Q on the outer surface    
  3. +Q on the inner surface, –q – Q on the outer surface    
  4. The charge –q is spread uniformly between the inner and outer surface.    

The correct answer is: – Q on the inner surface, – q + Q on the outer surface

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