# F.M., A.M. and S.S.B. transmitters

### Explanation of question 10

A desirable percentage modulation depth in an AM transmitter would be

1. zero
2. 25
3. 90
4. 150

The answer is :- 3 Without over-modulating (greater than 100%), as near to 100% as possible is desirable. In practice, 90% will suffice.

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