Question

A capacitor is formed from two concentric spherical conducting shells separated by vacuum. The inner sphere has radius 12.5 cm , and the outer sphere has radius 16.0 cm . A potential difference of 100 V is applied to the capacitor.

Part A

What is the energy density at r= 12.6 cm , just outside the inner sphere?

Part B

What is the energy density at r = 15.9 cm , just inside the outer sphere?

Part C

For a parallel-plate capacitor the energy density is uniform in the region between the plates, except near the edges of the plates. Is this also true for a spherical capacitor?

For a parallel-plate capacitor the energy density is uniform in the region between the plates, except near the edges of the plates. Is this also true for a spherical capacitor?

a) Yes

b) No

Answer 1