Previous Year NEET Question- Electrostatics L-6

Question: The angle between the electric lines of force and the equipotential surface is (NEET-2022)#

A) $0^{\circ}$

B) $45^{\circ}$

C) $90^{\circ}$

D) $180^{\circ}$

Answer: $90^{\circ}$#

Explanation#

Explanation

$\mathrm{dV}=-\vec{E} \cdot \overrightarrow{\mathrm{d} r}$

$\mathrm{dV}=-\mathrm{Edr} \cos \theta$

For equipotential surface,

$\mathrm{dV}=0$

$\cos \theta=0$

$\Rightarrow \theta=90^{\circ}$