Q. A parallel plate condenser with oil between the plates (dielectric constant of oil $K = 2$) has a capacitance $C.$ If the oil is removed, then capacitance of the capacitor becomes
A) $\sqrt{2}C$
B) $2C$
C) $\frac{C}{\sqrt{2}}$
D) $\frac{C}{2}$
Explanation
(d) $C_{air} = \frac{C_{medium}}{K} = \frac{C}{2}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.