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  4. The electric field at a point on the equatorial plane at a distance r from the centre of a dipole having dipole moment vecP is given by (r >> separation of two charges forming the dipole, ∈0-permittivity of free space)

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Q. The electric field at a point on the equatorial plane at a distance r from the centre of a dipole having dipole moment $\vec{P}$ is given by ($r >>$ separation of two charges forming the dipole, $\in_{0}$-permittivity of free space)

NEETNEET 2020Electric Charges and Fields

Solution:

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$\vec{E}=\frac{K\vec{P}}{r^{3}}$
$\vec{E}=-\frac{\vec{P}}{4\pi\,\in_{0}\,r^{3}}$