Antenna Fundamentals MCQ’s

Read Time:2 Minute, 3 Second

This set of Avionics Multiple Choice Questions & Answers (MCQs) focuses on “Antenna Fundamentals”.

1. In a current carrying conductor, what happens to the magnetic field produced if the supplied voltage is increased and current is maintained constant?
a) Field strength increases
b) Field radius increases
c) Filed strength decreases
d) Does not change

2. Which of the following is the most necessary for an electric field to exist?
a) Current
b) Potential difference
c) Dielectric material
d) Metal conductor

3. All EM waves propagate at the speed of light irrespective of medium.
a) True
b) False

4. What happens to the electric field between two conductors when the permeability of the material between the plates is increased?
a) Field strength increases
b) Field radius decreases
c) Field strength decreases
d) Nothing happens

5. The radiation from an open line can be increased by bending to which of the following angle?
a) 0°
b) 180°
c) 90°
d) 53.76°

6. The fields in the Fresnel zone are radio waves that contain the information transmitted.
a) True
b) False

7. Which of the following is not true?
a) A conductor carrying alternating current radiates
b) A transmission line must not radiate energy
c) Antennas are transmission lines which are made to radiate energy
d) A parallel wire transmission, when left open, does not radiate

8. What is the ratio of the electric field strength of a radiated wave to the magnetic field strength called?
a) Impedance of space
b) Dielectric constant
c) Permittivity
d) Permeability

9. At what distance from the antenna does the far field start?
a) 2 wavelengths
b) 5 wavelengths
c) 10 wavelengths
d) 25 wavelengths

10. An Em wave is said to be vertically polarized when the angle between the electrical field and earth is _______
a) 50°
b) 20°
c) 90°
d) 180°

11. What happens when a vertical or horizontal polarized antenna receives a circular polarized wave?
a) Gain increases
b) Signal strength increases
c) Signal strength reduces
d) Cannot receive circular polarized waves

12. The Far field is also known as ______________
a) Fresnel zone
b) Fraunhofer zone
c) Maxwell zone
d) Marconi zone

13. Which of the following is not true?
a) Right circular polarized antennas can pick up left circular polarized waves due to propagation effects
b) Circular polarization has lesser attenuation in free space
c) Circular polarized wave can follow the curvature of earth
d) In circular polarization the electric and magnetic fields rotate as they leave the antenna

14. Which of the following devices assist in using the same antenna for transmission and receiving?
a) Monoplexer
b) Multiplexer
c) Duplexer
d) Switch

Happy
Happy
0 %
Sad
Sad
0 %
Excited
Excited
0 %
Sleepy
Sleepy
0 %
Angry
Angry
0 %
Surprise
Surprise
0 %

Average Rating

5 Star
0%
4 Star
0%
3 Star
0%
2 Star
0%
1 Star
0%

Leave a Reply

Your email address will not be published. Required fields are marked *

Previous post Digital Signal Processing MCQ’s
Next post Types of Antenna – 1 MCQ’s