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If the modulation index of an amplitude modulated wave is changed from 0 to 1 , then the transmitted power will be

Options

  1. Aunchanged
  2. Bdoubled
  3. Cincreased by 50 %
  4. Dzero

Correct answer

C. increased by 50 %

Step-by-step solution

The transmitted power in AM wave is P_t= (1+ ^2 2 ) P_c where is the modulation index and P_c is the power in carrier wave. When =0, P_t=P_c and when =1, P_t= (1+ 1 2 ) P_c= 3 2 P_c The percentage increase in transmitted power = 3 2 P_c-P_c P_c 100 %= 1 2 100 %=50 %

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