MCQs on Radio Wave Propagation

MCQs on Radio Wave Propagation

Q1: Mathematical prediction of radio waves was done by

1. Einstein
2. Hertz
3. Faraday
4. Maxwell

Answer: (d) 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

Answer: (d) 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
2. Fading
3. Baffling
4. skip

Answer: (b) fading

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

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

Answer: (a) Ionospheric 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?

1. Angle of radiation
2. maximum usable frequency
3. Skip distance
4. Skip zone

Answer: (d) Skip zone

Q9: Which of the following are electromagnetic

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

Answer: (d) All the above

Q10: The radio waves were demonstrated experimentally by

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

Answer: (a) Hertz