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MCQ Practice Question
Communication SystemsAngle Modulation

In phase modulation, which carrier parameter is directly varied according to the message?

  • AAmplitude
  • BPhase
  • CAverage DC value
  • DPropagation speed
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Correct Answer: B. Phase
Explanation: PM varies the instantaneous phase of the carrier in accordance with the modulating signal.
Reference: Standard communication systems: angle modulation
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