The electric potential at the equatorial point of a small dipole with dipole moment p (at a distance r from the dipole) is :

1
zero
2
\(\frac{p}{4\pi\epsilon_0 r^2}\)
3
\(\frac{p}{4\pi\epsilon_0 r^3}\)
4
\(\frac{2p}{4\pi\epsilon_0 r^3}\)

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