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Questions  

A shell made of a conductor has inner radius a and outer radius b. and it carries charge Q. A dipole of dipole moment P is placed at its centre. Choose the correct alternative:

a
electric field outside the shell is the same as that of a point charge Q at the centre of the shell.
b
surface charge density on the inner surface of the shell is zero everywhere
c
surface charge density on the inner surface is uniform and equal to Q24πa2
d
surface charge density on the outer surface depends on |P→|.

detailed solution

Correct option is A

(i) Electric field outside sphere does not depends on inside charge, it depends on only outer charge.(ii) Surface charge density on inner surface is non-uniform and zero.(iii) Surface charge density on outer surface is non-uniform and zero,(iv) Surface charge density on outer surface does not depend on |P¯|

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Similar Questions

Two spherical conductors of radii R1 and R2 are separated by a distance much larger than the radius of either sphere. The spheres are connected by a conducting wire as shown in Fig. If the charges on the spheres in equilibrium are q1 and q2, respectively, what is the ratio of the field strength at the surfaces of the spheres?

 


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