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Digital Communication System MCQs

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Practice free Digital Communication System multiple-choice questions with instant answer feedback and step-by-step solutions. Click an option to check yourself, reveal the full explanation, and work through all 252 questions — no login required.

Question 28easy

The noise generated by a resistor depends upon

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Question 29easy

A carrier is amplitude-modulated by two sine waves of different frequencies with modulation indices 0.3 and 0.4. The resulting overall modulation index is

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Question 30easy

In television transmission, picture signals are transmitted by

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Question 31easy

In a pulse transmission system, the error rate

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Question 32easy

Increasing the height of the radiating antenna, the coverage area of a TV station would

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Question 33easy

PPM is a?modulation technique.