Amplitude modulated signals contain frequencies:
($\omega_c = \text{ carrier wave frequencies } , \omega_m = \text{ modulating signal frequencies}$)
(A) $\omega_c$
(B) 2$\omega_c$
(C) $\omega_c + \omega_m$
(D) $\omega_c - \omega_m$
Choose the correct answer from the options given below:
Answer & explanation
Correct answer: option 3
The modulation wave has namely three frequencies.
$(\omega_c - \omega_m) , \omega_c \text{ and }(\omega_c + \omega_m)$ .
$\omega_c$ is the carrier wave frequency, $\omega_c + \omega_m$ is the upper side band frequency and $\omega_c - \omega_m$ is lower side band frequency.