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Electronics and Communication Engineering - Electromagnetic Field Theory

Exercise : Electromagnetic Field Theory - Section 9
41.
An antenna couple is used due to all of the following reasons except
to prevent reradiation of the local oscillator
to discriminate against harmonics
to make the antenna look resistive
to provide the output amplifier with the correct load impedance
Answer: Option
Explanation:
No answer description is available. Let's discuss.
42.
The advantage of Marconi antenna over the ungrounded antenna is that
only one fourth of the height is required as compared to undergrounded antenna
one-half of the height is required as compared to undergrounded antenna
no capacitance required
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
43.
What will be the propagation constant at 10 MHz?
3.4 radians/km
34.4 radians/km
344 radians/km
3440 radians/km
Answer: Option
Explanation:
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44.
The reflection coefficient is generally a
complex number
fraction
imaginary number
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
45.
The absorption of radio waves by the atmosphere depends on
the polarization of the waves
the polarization of the atmosphere
frequency of the waves
their distance from the transmitter
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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