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

• A
  $\overrightarrow{E}=-\frac{\overrightarrow{p}}{4 \pi \epsilon_{0} r^{3}}$
• B
  $\overrightarrow{E}=\frac{\overrightarrow{p}}{4 \pi \epsilon_{0} r^{3}}$
• C
  $\overrightarrow{E}=\frac{2 \overrightarrow{p}}{4 \pi \epsilon_{0} r^{3}}$
• D
  $\overrightarrow{E}=-\frac{\overrightarrow{p}}{4 \pi \epsilon_{0} r^{2}}$