In amplitude modulation,the sinusoidal carrie | vedclass

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(A) In amplitude modulation,the modulated wave is represented by the expression: $E = E_c \sin(\omega_c t) + \frac{\mu E_c}{2} \cos((\omega_c - \omega

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$\omega_m$

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(A) In amplitude modulation,the modulated wave is represented by the expression: $E = E_c \sin(\omega_c t) + \frac{\mu E_c}{2} \cos((\omega_c - \omega_m)t) - \frac{\mu E_c}{2} \cos((\omega_c + \omega_m)t)$.From this expression,it is evident that the modulated wave consists of three distinct frequency components: the carrier frequency $\omega_c$,the lower sideband frequency $(\omega_c - \omega_m)$,and the upper sideband frequency $(\omega_c + \omega_m)$.The signal frequency $\omega_m$ itself is not present as a frequency component in the final modulated wave.Therefore,the correct option is $A$.

Column $A$	Column $B$
$A$. $D$-layer	$I$. $250-400 \ km$
$B$. $E$-layer	$II$. $170-190 \ km$
$C$. $F_1$-layer	$III$. $95-120 \ km$
$D$. $F_2$-layer	$IV$. $65-75 \ km$

In amplitude modulation,the sinusoidal carrier frequency is denoted by $\omega_c$ and the signal frequency is denoted by $\omega_m$. The bandwidth of the signal is such that $\omega_m << \omega_c$. Which of the following frequencies is not contained in the modulated wave?

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