Electronics and Communication Engineering - Electromagnetic Field Theory

46.
The cut off wavelength λc for TE20 mode for a standard rectangles waveguide is
2/a
2a
a
2a2
Answer: Option
Explanation:
No answer description is available. Let's discuss.

47.
F2 layer of atmosphere extends from
250 km to 400 km
150 km to 250 km
50 km to 150 km
15 km to 50 km
Answer: Option
Explanation:
No answer description is available. Let's discuss.

48.
Whereas resonant antenna is bidirectional, non-resonant antenna is unidirectional.
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.

49.
In radar system if the antenna diameter is increased by a factor of 4, the minimum range will increased by a factor of
1
2
22
4
Answer: Option
Explanation:
No answer description is available. Let's discuss.

50.
Which of the following antennas is λ /4 length?
Dipole
Marconi
Monopole
Parabolic
Answer: Option
Explanation:
No answer description is available. Let's discuss.