The outer sphere of a spherical air capacitor is earthed. For inc… - Vidyadip

MCQ

The outer sphere of a spherical air capacitor is earthed. For increasing its capacitance

A
Vacuum is created between two spheres
✓
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

✓

Answer

Correct option: B.

Dielectric material is filled between the two spheres

b
(b) In spherical capacitor $C = 4\pi {\varepsilon _0}K\,\left( {\frac{{ab}}{{b - a}}} \right)$ ==> $C \propto K$

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