PROPERTIES OF RADIO WAVES

Question 1

A radio wave is

Answer 1

c. an energy wave where there is an electrical field perpendicular to a magnetic field.

Question 2

2. The speed of radio waves is:

Answer 2

b. 300 million metres per second.

Question 3

3. The plane of polarisation of an electromagnetic wave is:

Answer 3

the plane of the electrical field.

Question 4

the wavelength of a radio wave is 3.75 metres, the frequency is:

Answer 4

80 MHz.

Question 5

5. The wavelength corresponding to a frequency of 125 MHz is:

Answer 5

a. 2.4 m.

Question 6

6. The frequency which corresponds to a wavelength of 6.98 cm is:

Answer 6

b. 4.298 GHz.

Question 7

7. The frequency band containing the frequency corresponding to 29.1 cm is:

Answer 7

d. UHF

Question 8

To carry out a phase comparison between two electromagnetic waves:

Answer 8

b. both waves must have the same frequency.

Question 9

The phase of the reference wave is 110° as the phase of the variable wave is 315°. What is the phase difference?

Answer 9

c. 155°

Question 10

The wavelength corresponding to a frequency of 15 625 MHz is:

Answer 10

c. 1.92 cm.

Question 11

Which frequency band is a wavelength of 1200 m?

Answer 11

b. LF