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What is the modulation index for an AM w...

What is the modulation index for an AM wave for which maximum amplitude is a and the minimum amplitudes is b.

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Here , `mu_a = ? A_(max) = a, A_(min=b,`
`mu_a = (A_(max)-A_(min))/(A_(min)+A_(max)) = (a-b)/(a+b)`.
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