Q. If a dielectric substance is introduced between the plates of a charged air-gap capacitor. The energy of the capacitor will
A) Increase
B) Decrease
C) Remain unchanged
D) First decrease and then increase
Explanation
(b) $U = \frac{Q^{2}}{2C};$ in given case $C$ increases so $U$ will decrease
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.