Q160 / 160 · AP EAMCET 2024 (20 May Shift 1) · Physics

A carrier is simultaneously modulated by two sine waves with modulation indices of 0.3 and 0.4 ; then the total modulation index is

  • A
    $1$
  • B
    $0.12$
  • Correct answer
    C
    $0.5$
  • D
    $0.7$

Solution

$\mu_1=0.3, \mu_2=0.4$ $\therefore$ Total modulation index, $\mu=\sqrt{\mu_1^2+\mu_2^2}=\sqrt{(0.3)^2+(0.4)^2}=0.5$

Hence, the correct answer is option: 'C'.

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