Exercise: Communication Systems

Questions for: Communication Systems

Present day stereophonic systems have
A:
only CD playback facility
B:
only tape playback facility
C:
both CD and tape playback facilities along with radio
D:
none of the above
Answer: C
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If D is diagonal and F is focal length, lens angle θ is
A:
θ = tan-1 (D/F)
B:
θ = 2 tan-1 (D/F)
C:
θ = tan-1 (D/2F)
D:
θ = 2 tan-1 (D/2F)
Answer: D
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Which of the following is likely to be associated with FM radio broadcasting?
A:
90 Hz
B:
90 kHz
C:
900 kHz
D:
90 MHz
Answer: D
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In which frequency range is the noise figure in a transistor independent of frequency
A:
intermediate frequencies
B:
high frequency
C:
low frequencies
D:
both low and high frequencies
Answer: A
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Speech amplifiers are usually operated as
A:
class A
B:
classes AB
C:
class B
D:
class C
Answer: A
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