Exercise: Communication Systems

Questions for: Communication Systems

In PM, without any modulation, all the transmitted pulses have the same
A:
amplitude
B:
width
C:
amplitude and spacing
D:
amplitude, spacing and width
Answer: D
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The total bandwidth needed for an AM signal at 55.25 MHz with 0.5 MHz video modulation is
A:
0.25 MHz
B:
0.5 MHz
C:
1 MHz
D:
10 MHz
Answer: C
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To couple a coaxial line to a parallel line wire it is best to use
A:
slotted line
B:
balun
C:
directional coupler
D:
transformer
Answer: B
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The unit of loudness is
A:
phon
B:
sone
C:
decibel
D:
mel
Answer: C
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Assertion (A): In TV scanning is done from left to right and top to bottom.

Reason (R): Interlaced scanning is useful in eliminating flicker

A:
Both A and R are correct and R is correct explanation of A
B:
Both A and R are correct but R is not correct explanation of A
C:
A is correct but R is wrong
D:
A is wrong but R is correct
Answer: B
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