Exercise: Communication Systems

Questions for: Communication Systems

For a three stage cascaded amplifier, having gains of G1, G2 and G3 and noise figures of F1, F2, F3 the overall noise figure
A:
B:
C:
D:
None of the above
Answer: A
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A trinitron colour picture tube uses
A:
three electron guns
B:
one electron gun
C:
one electron gun with three separate in line cathodes
D:
none of the above
Answer: C
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In figure (A) and (B)
A:
A represents PCM and B represents AM
B:
A represents FM and B represents AM
C:
A represents AM and B represents FM
D:
A represents PCM and B represents FM
Answer: C
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The noise figure of individual stages of a two stage amplifier is 2.03 and 1.54 respectively. If gain of first stage is 62, the overall noise figure is
A:
2.03
B:
2.055
C:
3.05
D:
6.05
Answer: B
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An antenna having a length of and grounded at one end is called
A:
Marconi antenna
B:
Yagi antenna
C:
Turnstile antenna
D:
None of the above
Answer: A
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