1. . What is the functioning role of an antenna in receiving mode?
(A) Radiator
(B) Converter
(C) Sensor
(D) Inverter
2. . In what range of frequencies are most omnidirectional horizontally polarized antennas used?
(A) VHF, UHF
(B) VLF, LF
(C) SH, EHF
(D) MF, HF
3. . A device that converts high frequency current into electromagnetic wave.
(A) Antenna
(B) Loudspeaker
(C) Microphone
(D) Transducer
4. . Hertzian Dipole carries which type of current throughout its length while radiating?
(A) Varying
(B) Depends upon type of polarization
(C) Constant
(D) Depends upon radiation resistance
5. . A Hertzian dipole consists of two ________ and ________ charges separated by a very short distance.
(A) unequal, opposite
(B) equal, same
(C) equal, opposite
(D) unequal, same
6. . A half wave dipole is sometimes called
(A) Marconi antenna
(B) Hertz antenna
(C) Yagi antenna
(D) None of the above
7. . What is the radiation characteristic of a dipole antenna?
(A) Omnidirectional
(B) Bidirectional
(C) Unidirectional
(D) Hemispherical
8. . An antenna which is one-fourth wavelength long is:
(A) Hertzian dipole
(B) Loop antenna
(C) Marconi antenna
(D) Elementary doublet
9. . The ability of an antenna to radiate more energy in one direction than in other direction is called
(A) Directivity
(B) Selectivity
(C) Active Antenna
(D) Resonance
10. . -------- of an antenna is a measure of how the antenna concentrates its radiated power in a given direction.
(A) Efficiency
(B) Power
(C) Polarization
(D) Gain