Question

The electric field at a distance ${}^{\prime }{r}^{\prime }$ from an infinitely long conducting sheet is proportional to

​​​​​​​$[$1 Mark$]$

• A. $r^{-1}$
• B. $r^2$
• C. $r^{-\frac{3}{2}}$
• D. independent of $r$

Answer 1

The correct option is D independent of $r$

The electric field at a point due to an infinitely long conducting sheet is given by

$E=\frac{\sigma }{{ϵ}_0}$

Where $\sigma$ is surface charge density

So, electric field is independent of distance $r$

$\therefore$ option (d) is correct