Question:
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 :
Correct Option: 1
Solution:
Bandwidth $=2 \times \mathrm{f}_{\mathrm{m}}$ $=2 \times 10^{5} \mathrm{HZ}=200 \mathrm{KHZ}$
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