Question

The total power content of an $AM$ wave is $900W$. For $100\%$ modulation, the power transmitted by each side band is

• A. $50W$
• B. $100W$
• C. $150W$
• D. $200W$

Answer 1

Answer: (C)

$150W$

Using the formula : $P_c=P_t\left[\frac{2}{2+m^2}\right]=900\left[\frac{2}{2+1}\right]=600W$
Now, $P_{LSB}=\frac{m^2}{4}\times P_c=\frac{1}{4}\times 600=150W$