The magnitude of electric field $\vec{E}$ in the annular region of a charged cylindrical capacitor :
Answer & explanation
Correct answer: option 3
The magnitude of electric field at a distance r from the axis is given as :
$E=\frac{\lambda}{2 \pi \varepsilon_0 r}$
i.e., $E \propto \frac{1}{r}$
Here, $\lambda$ is the charge per unit length of the capacitor.