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COMMUNICATION SYSTEMS

Communication Systems
The direction of rotation of a CD is

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

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

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

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

1000 ohm
100 ohm
500 ohm
300 ohm

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Communication Systems
In EM waves, polarization

Results from longitudinal nature of waves
Is always vertical in an isotropic medium
Is caused by reflection
Is due to transverse nature of waves

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

Medium frequency
High frequency
Very high frequency
Low frequency

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