Exercise: Electromagnetic Field Theory

Questions for: Electromagnetic Field Theory

Gain of isotropic antenna is
A:
10 dB
B:
0 dB
C:
∞
D:
1 dB
Answer: A
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Considerable ionization occurs between the range
A:
50 km to 400 km
B:
100 to 400 km
C:
50 km to 250 km
D:
10 to 50 km
Answer: A
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A parabolic antenna produces a radiation pattern which is
A:
circularly polarized
B:
highly directional
C:
omnidirectional
D:
linearly polarized
Answer: B
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A rectangular waveguide (2.29 x 1.02) cm operates at a freq. of 11 GHz in TE10 mode. If the maximum potential gradient of the signal is 5 kV/cm, then the maximum power handling capacity of the waveguide will be
A:
31.11 mW
B:
31.11 W
C:
31.11 kW
D:
31.11 MW
Answer: C
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A very reliable service has to be established between two points on earth separated by 1000 km. The band that will be used as
A:
MF
B:
VHF
C:
VLF
D:
HF
Answer: C
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