Exercise: Communication Systems

Questions for: Communication Systems

In EM waves, polarization
A:
is always vertical in an isotropic medium
B:
is caused by reflection
C:
is due to transverse nature of waves
D:
results from longitudinal nature of waves
Answer: C
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In practical commercial FM system, channel bandwidth is
A:
150 kHz
B:
100 kHz
C:
88 MHz
D:
108 MHz
Answer: A
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Skip distance depends on time of day and angle of incidence.
A:
True
B:
False
C:
D:
Answer: A
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It is found that a ship to ship communication suffers from fading. This can be avoided by using
A:
space diversity
B:
frequency diversity
C:
broad band antenna
D:
directional antenna
Answer: B
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If sampling is done at the rate of 10 kHz. The bandwidth required is
A:
35 kHz
B:
70 kHz
C:
10 kHz
D:
1280 kHz
Answer: A
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