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What will be the ratio of electric field at a point on the axis and an equidistant point on the equatorial line of a dipole:

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Important Questions on Electrostatics

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For a dipole q=2×10-6 C; d=0.01 m; find the maximum torque on the dipole if E=5×105 N C-1:-
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The electric potential at a point due to an electric dipole will be -
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The force on a charge situated on the axis of a dipole is F. If the charge is shifted to double the distance, the acting force will be -
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A small electric dipole is of dipole moment p. The electric potential at a distance 'r' from its centre and making an angle θ from the axis of dipole will be:
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If an electric dipole is placed in an electric field generated by a point charge, then 
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Two concentric conducting spheres are of radii r1 and r2. The outer sphere is given a charge q. The charge q' on the inner sphere will be (inner sphere is grounded) :-

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The charge given to any conductor resides on its outer surface, because:
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An uncharged sphere of metal is placed in between two charged plates as shown. The lines of force appear as :-