# MCQs on Radio Wave Propagation

Q1: Mathematical prediction of radio waves was done by

1. Einstein
2. Hertz
4. Maxwell

Q2: The electric field and magnetic field of a radio wave are

1. Perpendicular to each other
2. Perpendicular to the direction of propagation
3. Both a and b
4. None of the above

Answer: (c) Both a and b

Q3: The speed of radio wave in free space is

1. 3 x 106 metres/second
2. 3 x 108 metres/second
3. 3 x 106 miles/second
4. 3 x 108 miles/second

Answer: (b) 3 x 108 metres/second

Q4: Radio waves would strongly reflect off

1. A flat insulating surface of the right size
2. A flat metallic surface of the right size
3. A flat dielectric surface of the right size
4. A flat body of water

Answer:(b) A flat metallic surface of the right size

Q5: Radio waves sometimes bend around the corners due to

1. Reflection
2. Diffusion
3. Refraction
4. Diffraction

Q6: Which of the following is the phenomenon caused when Radio waves travel in two or more paths during propagation and produce slowly-changing phase differences between signals?

1. Absorption
3. Baffling
4. skip

Q7: High-frequency long-distance propagation mostly depends on

1. Ionospheric reflection
2. Tropospheric reflection
3. Ground reflection
4. Inverted reflection

Q8: What is the distance from the far end of the ground wave to the nearest point where the sky wave returns to earth called?

2. maximum usable frequency
3. Skip distance
4. Skip zone

Q9: Which of the following are electromagnetic

2. Light
3. Gamma waves
4. All the above

Q10: The radio waves were demonstrated experimentally by

1. Hertz
2. Maxwell
3. Marconi
4. Armstrong