Question

Which of the following electric field lines configuration is correct for an isolated positive point charge?
(Angles shown in the options are between the electric field lines and the tangent at the point of contact.)

• A.
• B.
• C.
• D.

Answer 1

The correct option is D

We know that,
$\left(1\right)$. Electric line of force are always perpendicular to the surface of the charged body.
$[$Fails in option $\left(b\right)$ and $\left(d\right)]$

$\left(2\right)$. For an isolated positive point charge, the electric line of force terminates at infinity.
$[$Fails in option $\left(c\right)$ and $\left(d\right)]$

These two assumptions of hypothetical concept of electric field lines are correctly represented only in option $\left(a\right)$.

Hence, option $\left(a\right)$ is correct.