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  4. The potential of dipole at its axial position is proportional to distance r as:

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Q. The potential of dipole at its axial position is proportional to distance r as:

Rajasthan PMTRajasthan PMT 2004

Solution:

The electric potential of electric dipole on its axial position is
$V=\frac{p}{4 \pi \varepsilon_{0} r^{2}}$
where $p=$ dipole moment
or $V \propto \frac{1}{r^{2}}$
or $V \propto r^{-2}$