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JEE Physics · Hard

Principles of Communication: Communication System MCQ

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Communication SystemHardQuestion 20227

Question

The process of retrieving the original message signal from a modulated carrier at the receiver is called:
  1. A
    Modulation
  2. B
    Amplification
  3. C
    Demodulation
    Correct
  4. D
    Multiplexing

Correct answer

Demodulation

Explanation

Demodulation (detection) is the inverse of modulation. An AM demodulator uses a rectifier and envelope detector; an FM demodulator uses a frequency discriminator or PLL.

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