In amplitude modulation,


In amplitude modulation, the message signal $\mathrm{V}_{\mathrm{m}}(\mathrm{t})=10 \sin \left(2 \pi \times 10^{5} \mathrm{t}\right)$ volts and

Carrier signal

$V_{C}(t)=20 \sin \left(2 \pi \times 10^{7} t\right)$ volts

The modulated signal now contains the message signal with lower side band and upper side band frequency, therefore the bandwidth of modulated signal is $\alpha \mathrm{kHz}$. The value of $\alpha$ is :

  1. $200 \mathrm{kHz}$

  2. $50 \mathrm{kHz}$

  3. $100 \mathrm{kHz}$

  4. 0

Correct Option: 1


Bandwidth $=2 \times \mathrm{f}_{\mathrm{m}}$ $=2 \times 10^{5} \mathrm{HZ}=200 \mathrm{KHZ}$

Leave a comment