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Question 20276
JEE Physics · Medium

Principles of Communication: Amplitude Modulation MCQ

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Amplitude ModulationMediumQuestion 20276

Question

In an AM broadcast station, the information is carried in the:
  1. A
    Carrier only
  2. B
    Sidebands only
  3. C
    The carrier and both sidebands
    Correct
  4. D
    Neither carrier nor sidebands

Correct answer

The carrier and both sidebands

Explanation

Standard AM (DSB-FC): both upper and lower sidebands plus the carrier are transmitted. The carrier helps the envelope detector at the cheap receiver to work simply. SSB (Single Sideband) transmission is more efficient (half the bandwidth, no carrier power) but needs synchronous detection.

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