Q. A parallel plate condenser with a dielectric of dielectric constant $K$ between the plates has a capacity $C$ and is charged to a potential $V\ volts.$ The dielectric stab is slowly removed from between the plates and then reinserted. The net work done by the system in this process is
A) $\frac{1}{2}(K - 1)CV^{2}$
B) $CV^{2}(K - 1)/K$
C) $(K - 1)CV^{2}$
D) Zero
Explanation
The correct answer is Option D: Zero.
A detailed explanation for this question is being prepared.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.