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(A) Given that the amplitude of the audio signal is $E_m = \frac{1}{2} E_c$,where $E_c$ is the amplitude of the carrier wave.The modulation index $m_a

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$0.5$

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(A) Given that the amplitude of the audio signal is $E_m = \frac{1}{2} E_c$,where $E_c$ is the amplitude of the carrier wave.The modulation index $m_a$ is defined as the ratio of the amplitude of the modulating signal to the amplitude of the carrier wave:$m_a = \frac{E_m}{E_c}$Substituting the given value:$m_a = \frac{\frac{1}{2} E_c}{E_c} = 0.5$Thus,the modulation index is $0.5$.

If the amplitude of an audio signal is half the amplitude of the carrier wave,what is the modulation index?

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