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

Vacuum is created between two spheres

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Dielectric material is filled between the two spheres

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The space between two spheres is increased

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The earthing of the outer sphere is removed

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Solution

The correct option is B Dielectric material is filled between the two spheres

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Similar questions

Q. A spherical capacitor consists of an inner sphere of radius

12 cm

and the outer sphere of radius

36 cm

. The capacitance is

C_{1}

when the inner sphere is charged and the outer sphere is earthed and

C_{2}

when the inner sphere is earthed and outer sphere is charged. The ratio

\frac{C_{1}}{C_{2}}

Capacity of a spherical capacitor is C₁ when inner sphere is charged and outer sphere is earthed and C₂ when inner sphere is earthed and outer sphere is charged. Thenis (a = radius of inner sphere, b = radius of outer sphere)

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.

Q. A spherical capacitor has an inner sphere of radius 12 cm and anouter sphere of radius 13 cm. The outer sphere is earthed and theinner sphere is given a charge of 2.5 μC. The space between theconcentric 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 anisolated sphere of radius 12 cm. Explain why the latter is muchsmaller.

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