A solid conducting sphere of radius $R_1$ is surrounded by another concentric hollow conducting sphere of radius $R_2$. The capacitance of this assembly is proportional to
A solid conducting sphere of radius $R_1$ is surrounded by another concentric hollow conducting sphere of radius $R_2$. The capacitance of this assembly is proportional to
- A
$\frac{{{R_2} - {R_1}}}{{{R_1}{R_2}}}$
- B
$\frac{{{R_2} + {R_1}}}{{{R_1}{R_2}}}$
- C
$\frac{{{R_1}{R_2}}}{{{R_1} + {R_2}}}$
- D
$\frac{{{R_1}{R_2}}}{{{R_2} - {R_1}}}$
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- [AIIMS 2009]
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