Q. The energy of a charged capacitor is given by the expression ($q =$ charge on the conductor and $C =$ its capacity)
A) $\frac{q^{2}}{2C}$
B) $\frac{q^{2}}{C}$
C) $2qC$
D) $\frac{q}{2C^{2}}$
Explanation
(a) $q = CV$ and $U = \frac{1}{2}CV^{2} = \frac{q^{2}}{2C}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.