Exercise: Electromagnetic Field Theory

Questions for: Electromagnetic Field Theory

The total field produced by an antenna array system at a distance from it is
A:
sum of the field produced by the individual antennas of the array system
B:
directional gain of antenna
C:
linear antenna gain
D:
vector sum of the field produced by the individual antennas of the array system
Answer: D
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A TEM wave incident obliquely on a dielectric boundary with εr1 = 2 and εr2 = 1, the angle of incidence for total reflection is
A:
30°
B:
60°
C:
45°
D:
90°
Answer: C
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When a magnetic circuit is compared with an electric circuit, the equivalent of the magnetic flux is
A:
the conductivity of the lines
B:
the voltage of the source
C:
the current in the lines
D:
the conductance of the load
Answer: C
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Poynting vector signifies which of the following?
A:
Power density vector producing electrostatic field
B:
Power density vector producing electromagnetic field
C:
Current density vector producing electrostatic field
D:
Current density vector producing electromagnetic field
Answer: B
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For aeroplane and navigation frequency band is
A:
VLF
B:
UHF
C:
VHF
D:
EHF
Answer: B
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