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Electronics and Communication Engineering - Electromagnetic Field Theory

Exercise : Electromagnetic Field Theory - Section 4
41.
Maximum effective aperture of a antenna is
1.3 λ2
0.13 λ2
13 λ2
3.1 λ2
Answer: Option
Explanation:
No answer description is available. Let's discuss.
42.
Voltage standing wave pattern in a loss less transmission line with characteristic impedance 50 Ω and a resistive load is shown in the figure.

Reflection coefficient is given by
-0.6
-1
0.6
0
Answer: Option
Explanation:
No answer description is available. Let's discuss.
43.
Which of the following wave remains unaffected during day and night?
Tropospheric wave
Sky wave
Ground wave
None of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
44.
A microwave link uses only line-of-sight propagation.
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.
45.
The phase velocity of an EM wave propagating in a hollow metallic rectangular waveguide in the TE10 mode is
equal to its group velocity
less than the velocity of light in free space
equal to the velocity of light in free space
greater than the velocity of light in free space
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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