Properties of Radio Waves: DGCA Air Navigation questions

Question 1

A radio wave is:

Accepted Answer

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

Answer

an energy wave comprising an electrical field in the same plane as a magnetic field

Answer

an electrical field alternating with a magnetic field

Answer

an energy field with an electrical component

Question 2

The speed of radio waves is:

Accepted Answer

300 million metres per second

Answer

300 km per second

Answer

162 NM per second

Answer

162 million NM per second

Question 3

The plane of polarization of an electromagnetic wave is:

Accepted Answer

the plane of the electrical field

Answer

the plane of the magnetic field

Answer

the plane of the electrical or magnetic field dependent on the plane of the aerial

Answer

none of the above

Question 4

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

Accepted Answer

80 MHz

Answer

80 kHz

Answer

8 MHz

Answer

800 kHz

Question 5

The wavelength corresponding to a frequency of 125 MHz is:

Accepted Answer

2.4 m

Answer

24 m

Answer

24 cm

Answer

24 mm

7 more questions in this chapter, free with an account