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Communication Systems

Communication Systems
For attenuation of high frequencies we should use

Inductance
Series capacitance
Resistance
Shunt capacitance

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Communication Systems
The modulation index of an FM is changed from 0 to 1. How does the transmitted power change?

Remains unchanged
Gets increased by 50 percent
Gets doubled
Gets halved

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Communication Systems
For AM receivers the standard IF frequency is

455 kHz
106 kHz
10.7 MHz
1.07 MHz

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Communication Systems
The direction of rotation of a CD is

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

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Communication Systems
The main function of a balanced modulator is to

Produce balanced modulation of a carrier wave
Produce 100% modulation
Suppress carrier signal in order to create a single-sideband or double sideband
Limit noise picked by a receiver

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Communication Systems
A telephone channel requires a bandwidth of about

10 kHz
1 kHz
50 kHz
3 kHz

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