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JEE Main · 2022 · 26 Jun 2022 · Shift 1 · Semiconductors

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Choose the correct statement for amplitude modulation:
  1. (A)Amplitude of modulating is varied in accordance with the information signal.
  2. (B)Amplitude of modulated is varied in accordance with the information signal.
  3. (C)Amplitude of carrier signal is varied in accordance with the information signal.✓ Correct
  4. (D)Amplitude of modulated is varied in accordance with the modulating signal.

Answer: (C)

Solution

In amplitude modulation (AM), the amplitude of the high-frequency carrier wave is varied in accordance with the instantaneous amplitude of the message (information) signal. The carrier frequency remains constant while its amplitude envelope follows the message signal. This is the defining characteristic of AM.

JEE Main · 2022 · 26 Jun 2022 · Shift 1 · Single correct option

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