# Resonance and its applications

### Explanation of question 9

Fig. 10.3 shows the tuning circuit of a receiver. The p.d. across the variable capacitor will be

1. high
2. high when the capacitor is tuned to resonance
3. low
4. low when the capacitor is tuned to resonance

The answer is :- 2 At resonance, the p.d. across the capacitor will be at its highest value because of the voltage magnification.

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