Chapter 1 - Basic Radio Theory

Question 1

Give the speed of a EM radio wave in a vacuum

Answer 1

300,000,000 m/s

3 x 10^8 m/s

Question 2

What is frequency

Answer 2

cycles per second

Question 3

Give the formula for wave length

Answer 3

Landa = c (speed of light)
————————–
f (frequency Hz)

Question 4

Give size for
Kilo
Mega
Giga

Answer 4

K - 000
M - 000 000
G - 000 000 000

Question 5

Surface wave is which freq and slow because

Answer 5

VLF and LF

slower because it is in the friction zone next to the earth’s surface

Question 6

A skywave does what in the ionosphere

Answer 6

Refracts

Question 7

What happens to the ionosphere during the night and what does that do to range and accuracy

Answer 7

It is higher
increase range
decrease accuracy

Question 8

If an antenna is fed with AC which two fields are generated

Answer 8

Electrical
Magnetic

These fields are perpendicular to each other

Question 9

Diffraction is

Answer 9

Radio waves travel over and around obstacles

Question 10

Space waves are

Answer 10

Line of sight and high frequency