Two spherical conductors A and B of radius a and b (b > a) are placed in air concentrically B is

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2. Electric Potential and Capacitance

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Two spherical conductors $A$ and $B$ of radius $a$ and $b (b > a)$ are placed in air concentrically $B$ is given charge $+ Q$ coulomb and $A$ is grounded. The equivalent capacitance of these is

A

$4\pi {\varepsilon _0}\frac{{ab}}{{b - a}}$

B

$4\pi {\varepsilon _0}\,(a + b)$

C

$4\pi {\varepsilon _0}b$

D

$4\pi {\varepsilon _0}\frac{{{b^2}}}{{b - a}}$

Solution

(d)

Standard 12

Physics

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