The outer sphere of a spherical air capacitor is earthed. For increasing its capacitance
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(b) In spherical capacitor $C = 4\pi {\varepsilon _0}K\,\left( {\frac{{ab}}{{b - a}}} \right)$ ==> $C \propto K$
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$A$. the charge stored in it, increases.
$B$. the energy stored in it, decreases.
$C$. its capacitance increases.
$D$. the ratio of charge to its potential remains the same.
$E$. the product of charge and voltage increases.
Choose the most appropriate answer from the options given below: