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Communication Systems

Communication Systems
A buffer amplifier is

None of these
A high gain D.C. amplifier
A double-tuned amplifier
A cathode follower stage

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Communication Systems
A woofer should be fed from the input through a

Band pass filter
Low pass filter
Band stop filter
High pass filter

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Communication Systems
FM transmitting and receiving equipment as compared to AM equipment is

Almost equally costly
Costly
Cheaper
None of these

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Communication Systems
For telegraphy the most commonly used modulation system is

Two tone modulation
FSK
Single tone modulation
PCM

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Communication Systems
An FM radio receiver which is tuned to a 91.6 MHz broadcast station may receive an image frequency of __________ MHz.

70.2
102.3
80.9
113

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Communication Systems
In case of low level amplitude modulation system, the amplifiers following the modulated stage must be

Non-linear devices
Linear devices
Class C amplifiers
Harmonic devices

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