The modulation index for amplitude modulation, expressed using the maximum and minimum values of the envelope, is given by which relation?

mₐ = (E_max + E_min) / E_min
mₐ = (E_max - E_min) / E_max
mₐ = (E_max - E_min) / (E_max + E_min)
mₐ = (E_max + E_min) / (E_max - E_min)

Correct answer: mₐ = (E_max - E_min) / (E_max + E_min)

Solution

The modulation index for amplitude modulation is defined as the ratio of the difference between the maximum and minimum envelope values to the sum of those values, which effectively measures the extent of modulation in the signal.

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