The electric potential (V) at a point on the axis of an electric dipole which is at very large distance r from the centre of dipole depends on the distance r as

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V∝1r

V∝1r2

V∝r

V∝1r3

answer is B.

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Detailed Solution

Electric potential due to dipole in its general position is given by V=k.pcosθr2⇒V∝1r2

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