For an \( \mathrm{AM} \) wave, the maximum voltage was found to be 10 \( \mathrm{V} \) and minim...

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For an \( \mathrm{AM} \) wave, the maximum voltage was found to be 10 \( \mathrm{V} \) and minimum voltage was \( 4 \mathrm{~V} \). The modulation index of the wave is
(a) \( 0.33 \)
(b) \( 0.43 \)
(c) \( 0.56 \)
(d) \( 0.64 \)
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