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Communication Systems

Communication Systems
The frequency range of 300 kHz to 3000 kHz is known as

Very high frequency
Medium frequency
High frequency
Low frequency

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Communication Systems
In a FM receiver, amplitude limiter

Eliminates any change in amplitude of received FM signals
Reduces the amplitude of signals
Amplifiers low frequency signals
None of these

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Communication Systems
Skip distance depends on time of day and angle of incidence.

True
False

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Communication Systems
PAM stands for

Phase Analogue Modulation
Phase Amplitude Modulation
Pulse Analogue Modulation
Pulse Amplitude Modulation

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Communication Systems
The characteristic impedance of a twin wire feeder used for TV signals is about

300 ohm
100 ohm
500 ohm
1000 ohm

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Communication Systems
The direction of rotation of a CD is

Mostly anticlockwise but some times clockwise
Clockwise
Clockwise or anticlockwise depending on frequency of data stored
Anticlockwise

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