A spherical condenser has inner and outer spheres of radii a and b respectively. The space between the two is filled with air. The difference between the capacities of two condensers formed when outer sphere is earthed and when inner sphere is earthed will be
A
Zero
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
C
Capacity when outer sphere is earthed
Capacity when inner sphere is earthed
Difference in capacity = C 2 – C 1 = 4 π π ε ε 0 b
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