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Communication SystemsAmplitude Modulation

An AM signal has carrier amplitude 10 V and modulating-signal amplitude 5 V. Its modulation index is?

  • A0.25
  • B0.5
  • C1.0
  • D2.0
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Correct Answer: B. 0.5
Explanation: m=Am/Ac=5/10=0.5, corresponding to 50% modulation.
Reference: Standard communication systems: amplitude modulation
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