Q. The outer sphere of a spherical air capacitor is earthed. For increasing its capacitance
A) Vacuum is created between two spheres
B) Dielectric material is filled between the two spheres
C) The space between two spheres is increased
D) The earthing of the outer sphere is removed
Explanation
(b) In spherical capacitor $C = 4\pi\varepsilon_{0}K\left( \frac{ab}{b - a} \right) \Rightarrow C \propto K$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.