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AIIMS2011PhysicsCommunication System

Voltage of modulating wave of 5 ~V with 10 MHz frequency was superimposed on carrier wave of frequency 20 MHz and voltage 20 ~V then the modulation index is

Options

  1. A0.25
  2. B1.25
  3. C2.43
  4. D64.0

Correct answer

A. 0.25

Step-by-step solution

Given, A_m=5 ~V , A_c=20 ~V Modulation index, = A_m A_c = 5 20 =0.25

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