The angle between the electric dipole moment of a dipole and the electric field strength due to it on the…
The angle between the electric dipole moment of a dipole and the electric field strength due to it on the equatorial line is
$0^{\circ}$
$90^{\circ}$
$180^{\circ}$
$270^{\circ}$
Solution
The electric field at equatorial line is
$\overrightarrow{\mathrm{E}}=\frac{-\mathrm{K} \overrightarrow{\mathrm{P}}}{\mathrm{r}^3} \Rightarrow \overrightarrow{\mathrm{E}}$ and $\overrightarrow{\mathrm{P}}$ are anti parallel
$\therefore \quad \theta=$ Angle between $\overrightarrow{\mathrm{E}}$ and $\overrightarrow{\mathrm{P}}=180^{\circ}$