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When air in a capacitor is replaced by a medium of dielectric constant \(K\), the capacitance

1. Decreases \(K\) times
2. Increases \(K\) times
3. Increases \(2K\) times
4. Remains constant

Correct answer: Increases \(K\) times

Solution

When air is replaced by a dielectric of constant \(K\), the capacitance becomes \(C' = KC\). Therefore it increases by a factor of \(K\).

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