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Question 20233
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Principles of Communication: Amplitude Modulation MCQ

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Amplitude ModulationEasyQuestion 20233

Question

The bandwidth of an AM signal carrying a single-tone message of frequency f_m is:
  1. A
    f_m
  2. B
    2f_m
    Correct
  3. C
    f_m / 2
  4. D
    4f_m

Correct answer

2f_m

Explanation

AM produces two sidebands: upper sideband at fc + fm and lower sideband at fc − fm. Total BW = (fc+fm) − (fc−fm) = 2fm.

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