A Best Way To Crack Gorenment Job Exams

Electronics Engineering Objective Questions { Antenna }

8. Antennas commonly used for microwave links are
A. loop antennas
B. log-periodic antennas
C. paraboloidal dishes
D. rhombic antennas
Discuss in Forum

9. Lens antennas used for microwaves are usually made of
A. polystyrene
B. glass of low refractive index
C. paraboloid surfaces
D. dielectric media having large refractive index
Discuss in Forum

10. The radiation field of an antenna varies as
B. ?r
D. None of the above
Discuss in Forum

11. A parabolic antenna is commonly used at
A. 500 kHz
B. 50 MHz
C. 5000 MHz
D. 50 Hz
Discuss in Forum

12. A loop antenna is commonly used for
A. radar
B. direction finding
C. satellite communication
D. aeronautical Engg.
Discuss in Forum

13. Which one of the following is a low-gain but omnidirectional antenna?
A. discone
B. log-periodic
C. loop
D. helical
Discuss in Forum

14. Which one of the following is not a wide-band antenna?
A. Marconi
B. hehcal
C. rhombic
D. folded dipole
Discuss in Forum

Page 2 of 20

« 1  2  34 »