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  • 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

2.30 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 \mu C. The space between the concentric spheres is filled with a liquid of dielectric constant 32.

(a) Determine the capacitance of the capacitor.

Answers (1)

best_answer

The capacitance of the capacitor is given by:

C=\frac{4\pi \epsilon _0\epsilon _rr_1r_2}{r_1-r_2}

Here,

C=\frac{32*0.12*0.13}{9*10^9*(0.13-0.12)}=5.5*10^{-9}F

Hence Capacitance of the capacitor is 5.5*10^{-9}F.

Posted by

Pankaj Sanodiya

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