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Electronics and Communication Engineering - Electromagnetic Field Theory

Exercise : Electromagnetic Field Theory - Section 9
16.
For frequency up to 1650 kHz, the transmitting antenna is used a
parabolic dish
vertical antenna
yagi antenna
turnstile antenna
Answer: Option
Explanation:
No answer description is available. Let's discuss.
17.
Radar antennas are
dipoles
helical
parabolic
conical
Answer: Option
Explanation:
No answer description is available. Let's discuss.
18.
Which of the following is high frequency transmission line?
An impedance transformer
Frequency compensator
Flying resistor
None of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
19.
Which of the following are the properties of a medium?
Permeability, flux, magnesium
Permittivity, permeability, insulation
Permeability, resistivity, conductivity
Permittivity, permeability, conductivity
Answer: Option
Explanation:
No answer description is available. Let's discuss.
20.
In microwave communication, some times, microwave signals reach large distances by following the earth curvature. This phenomenon is called
tropospheric scatter
faraday effect
ionospheric reflection
ducting
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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