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
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
- [AIIMS 2017]
- A
$4\pi {\varepsilon _0}\frac{{ab}}{{b - a}}$
- B
$4\pi {\varepsilon _0}(a + b)$
- C
$4\pi {\varepsilon _0}b$
- D
$4\pi {\varepsilon _0}a$
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