what will be capaci†an ce of a spherical capacitor if the inner cell is earthed

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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)

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}}

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