Q. A parallel plate capacitor having air as dielectric medium is charged by a potential difference of $V$ volt. After disconnecting the battery, the distance between the plates of the capacitor is increased using an insulated handle. As a result ,potential difference between the plates
A) Increases
B) Does not change
C) Becomes zero
D) Decreases
Explanation
(a) Electric field $E = \frac{V}{d}$
$\therefore\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ V \propto d$
As the distance between the plates of the capacitor increases potential difference also increases.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.