# Amplifiers

### Explanation of question 14

- i Class C amplification is often used for frequency multipliers
- ii A push-pull circuit is often used as a frequency doubler

1. i and ii are both true
2. i is true but ii is false
3. i is false but ii is true
4. i and ii are both false

The answer is :- 2 Being rich in harmonics, class C amplifiers are ideal for use as frequency multipliers. As a frequency tripler, a push-pull circuit is often used—but not for an even number (e.g. doubler).

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