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
Capacitance of spherical condenser, when outer sphere is earthed,
Capacitance of spherical condenser when inner sphere is earthed, 
Difference in their capacity
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