# Transmission lines (feeders)

### Explanation of question 8

A length of coaxial cable has a velocity factor of 2/3. The velocity of propagation in the cable in m/s will be

1. 1 x 108
2. 2 x 108
3. 3 x 108
4. 4.5 x 108

The answer is :- 2 The velocity of propagation in free space is 3 x 108 m/s. The velocity of propagation in the cable will therefore be

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