Question

If modulation index is $1/2$ and power of carrier wave is $2W$. Then what will be the total power in modulated wave?

• A. $0.5W$
• B. $1W$
• C. $0.25W$
• D. $2.25W$

Answer 1

The correct option is D $2.25W$

The total power in modulated wave is related to the modulation index and power in carrier wave by:

$P_{total}=(1+\frac{m^2}{2})P_{carrier}$

Substituting the values, we have,

$P_{total}=(1+\frac{{0.5}^2}{2})\times 2$

$P_{total}=2.25W$