Capacity of an isolated sphere is increased n times when it is enclosed by an earthed concentric sphere. The ratio of their radii is

Open in App

Solution

Suggest Corrections

Similar questions

Q. Capacity of an isolated sphere is increased

n

times when it is enclosed by an earthed concentric sphere. The ratio of their radii is

Q. The capacitance (C) for an isolated conducting sphere of radius (a) is given by

4 π ϵ_{o} a

. If the sphere is enclosed with an earthed concentric sphere. The ratio of the radii of the spheres being

\frac{n}{n - 1}

then the capacitance of such a sphere will be increased by a factor.

Q. The capacity of an isolated sphere of radius

9 c m

C

. When it is connected to an earthed concentric thin hollow sphere of radius

R

, the capacity becomes

10 C

. Then the value of

R

Q. The capacity of an isolated conducting sphere of radius

R

is proportional to :

A spherical capacitor has an inner sphere of radius 12 cm and an outer sphere of radius 13 cm. The outer sphere is earthed and the inner sphere is given a charge of 2.5 µC. The space between the concentric spheres is filled with a liquid of dielectric constant 32.

(a) Determine the capacitance of the capacitor.

(b) What is the potential of the inner sphere?

(c) Compare the capacitance of this capacitor with that of an isolated sphere of radius 12 cm. Explain why the latter is much smaller.

Join BYJU'S Learning Program