# Transmitter interference

### Explanation of question 15

- i A parasitic oscillation may be caused by a resonant length of wire
- ii Parasitic oscillations may cause instability and distortion

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 :- 1A resonant length of wire could be the cause of a parasitic oscillation at v.h.f. or u.h.f. A practical solution may be the use of an r.f. choke, resistor or ferrite beads. Instability and distortion are two possible effects of parasitic oscillations.

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