Question

What is the angle between the electric dipole moment and the electric field strength due to it on the equatorial line?

• A. $0^o$
• B. ${90}^o$
• C. ${180}^o$
• D. none of these

Answer 1

The correct option is C ${180}^o$

$\text{Step 1: Angle between Electric field and Dipole}$ $\text{[Refer Fig.]}$

At a point $P$ on equatorial line

${\overrightarrow{E}}_R$ is net electric field due to dipole at point P as shown in the figure, directed Leftwards.

The direction of dipole vector $\overrightarrow{P}$ is from $-q$ to $+q$ charge, i.e. Rightwards.

Therefore, The angle between electric dipole moment and electric filed on the equitorial line is ${180}^{\circ }$

Hence option $\left(C\right)$ correct