Question

The angle between the electric dipole moment and the electric field strength due to it, on the equatorial line is :

• A. $0^0$
• B. ${90}^0$
• C. ${180}^0$
• D. ${60}^0$

Answer 1

Answer: (C)

${180}^0$

The equitorial line is the line perpendicular and bisecting the dipole. On the line, the electric field is given by $\frac{-k\overrightarrow{p}}{r^3}$. The direction of $\overrightarrow{E}$ is opposite to that of $\overrightarrow{p}$.