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(D) The modulation index $\mu$ is defined as the ratio of the amplitude of the modulating signal $(A_m)$ to the amplitude of the carrier wave $(A_c)$.

Vedclass · Accepted Answer

$100$

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(D) The modulation index $\mu$ is defined as the ratio of the amplitude of the modulating signal $(A_m)$ to the amplitude of the carrier wave $(A_c)$.Mathematically, $\mu = \frac{A_m}{A_c}$.Given that the amplitude of the modulated signal is equal to the amplitude of the carrier wave, we have $A_m = A_c$.Therefore, $\mu = \frac{A_m}{A_m} = 1$.To express this as a percentage, we multiply by $100$.Thus, the modulation index is $1 	imes 100 = 100\%$.

If the amplitude of the modulated wave and the amplitude of the signal are equal, then the modulation index is .....$\%$

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