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Question 20239
JEE Physics · Hard

Principles of Communication: Frequency Modulation MCQ

Solve this quality-checked JEE multiple-choice question, then review the correct answer and explanation.

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Frequency ModulationHardQuestion 20239

Question

Which property makes FM superior to AM for music broadcasting?
  1. A
    AM has wider bandwidth
  2. B
    FM amplitude is constant so it is less affected by amplitude noise
    Correct
  3. C
    FM uses lower frequencies
  4. D
    AM requires more complex receivers

Correct answer

FM amplitude is constant so it is less affected by amplitude noise

Explanation

Lightning, ignition, and other noise sources add amplitude spikes. Since FM information is in frequency (not amplitude), a limiter at the receiver removes amplitude variations — noise suppression is far better than AM.

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