# Transmission lines (feeders)

### Explanation of question 7

The ‘velocity factor’ of a feeder is given by the ratio a velocity of propagation in free space velocity of propagation in the feeder velocity of propagation in free space

2. ' and is the same as the term 'velocity ratio'
4. , and is the same as the term 'velocity ratio'

The answer is :- 4 The velocity of propagation in a feeder is less than the velocity of propagation in free space. The terms ‘velocity factor’ and ‘velocity ratio’ are synonymous. Thus, 4 is the correct response.

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