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Electronics and Communication Engineering - Electromagnetic Field Theory

Exercise : Electromagnetic Field Theory - Section 11
36.
In a four element Yagi-Uda antenna
there is one driven element, one director and two reflectors
there is one driven element, two directors and one reflector
there are two driven elements, one director and two reflectors
all the 4 elements are driven element
Answer: Option
Explanation:
No answer description is available. Let's discuss.
37.
The statement that the line integral of magnetic field about any closed path is exactly equal to the direct current enclosed by that path, is known as
Ampere's circuital law
Coulomb's law
Electrostatic's theory
None of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
38.
Transverse magnetic (TM) waves have
magnetic field component H in the direction of propagation
electric field component E in the direction of propagation
magnetic field component H in the direction of propagation and no component of electric field E in this direction
electric field component E in the direction of propagation and no component of magnetic field H in this direction
Answer: Option
Explanation:
No answer description is available. Let's discuss.
39.
UHF and microwaves in the frequency range 300 MHz to 30 GHz can be best transmitted using __________ propagation
sky wave
ground wave
duct
none of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.
40.
The directive gain of λ/2 resonant wire is 1.64.
True
False
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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