Question
Medium
Solving time: 3 mins
(a) Find the capacitance of a spherical capacitor, if the outer sphere is charged and the inner sphere is earthed. Given radius of inner sphere , radius of outer sphere . (b) Two conducting spheres are placed concentrically. The inner sphere is earthed and the outer given a charge . The radii of sphere are and . What is the charge on the inner sphere? Will there be any charge on the inner surface of the outer sphere ? Explain.
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Text solutionVerified
(b) When inner sphere is earthed, its potential becomes zero. To make the potential of inner sphere to be zero, some negative charge must be appear on the inner sphere to cancel the positive potential of outer sphere. If be the charge on the inner sphere, then
(a) Capacitance,
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Question Text | (a) Find the capacitance of a spherical capacitor, if the outer sphere is charged and the inner sphere is earthed. Given radius of inner sphere , radius of outer sphere .
(b) Two conducting spheres are placed concentrically. The inner sphere is earthed and the outer given a charge . The radii of sphere are and . What is the charge on the inner sphere? Will there be any charge on the inner surface of the outer sphere ? Explain.
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Topic | Electrostatic Potential and Capacitance |
Subject | Physics |
Class | Class 12 |
Answer Type | Text solution:1 |
Upvotes | 127 |