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Question 20232
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Principles of Communication: Amplitude Modulation MCQ

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Amplitude ModulationEasyQuestion 20232

Question

When μ > 1 in AM, the signal is said to be:
  1. A
    Under-modulated
  2. B
    Critically modulated
  3. C
    Over-modulated
    Correct
  4. D
    Phase-modulated

Correct answer

Over-modulated

Explanation

Over-modulation (μ > 1) causes the envelope to go negative — the carrier is cut off for part of the cycle, producing severe distortion at the receiver.

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