Two spherical conductors A and B of radii a and b(b > a) are placed concentrically in air. The two are connected by a copper wire as shown in figure. Then the equivalent capacitance of the system is
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a
4πε0ab(b−a)
b
4πε0(a+b)
c
4πε0b
d
4πε0a
answer is C.
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Detailed Solution
All the charges given to the inner sphere will pass on to the outer one. So, the capacitance of that outer one =4πε0b.
Two spherical conductors A and B of radii a and b(b > a) are placed concentrically in air. The two are connected by a copper wire as shown in figure. Then the equivalent capacitance of the system is