If a carrier wave $C(t) = A \sin \omega_c t$ is amplitude modulated by a modulating signal $m(t) = A \sin \omega_m t$,then the equation of the modulated signal $[C_m(t)]$ and its modulation index are respectively:

  • A
    $C_m(t) = A(1 + \sin \omega_m t) \sin \omega_c t$ and $2$
  • B
    $C_m(t) = A(1 + \sin \omega_m t) \sin \omega_m t$ and $1$
  • C
    $C_m(t) = A(1 + \sin \omega_m t) \sin \omega_c t$ and $1$
  • D
    $C_m(t) = A(1 + \sin \omega_c t) \sin \omega_m t$ and $2$

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