Define modulation index. Give its physical significance. For an amplit

1.	Define modulation index. Give its physical significance. For an amplitude modulated wave, the maximum amplitude is found to be 10V while the minimum amplitude is 2V. Determine the modulation index μ.
Answer» Modulation index: It is the ratio of peak value of modulating signal to the peak value of carrier wave. μ = A_m/A_c Physical significance: It signifies the level of distortion or noise. A lower value of modulation index indicates a lower distortion in the transmitted signal. Maximum amplitude, A_max = A_c + A_m = 10 V Minimum aptitude, A_min = A_c – A_m = 2V Modulation index = (Amax - Amin))/(Amax + Amin) = (10 - 2)/(10 + 2) = 8/12 = 2/3.

Define modulation index. Give its physical significance. For an amplitude modulated wave, the maximum amplitude is found to be 10V while the minimum amplitude is 2V. Determine the modulation index μ.

Answer»

Modulation index: It is the ratio of peak value of modulating signal to the peak value of carrier wave.

μ = A_m/A_c

Physical significance: It signifies the level of distortion or noise. A lower value of modulation index indicates a lower distortion in the transmitted signal.
Maximum amplitude, A_max = A_c + A_m
= 10 V
Minimum aptitude, A_min = A_c – A_m = 2V

Modulation index = (Amax - Amin))/(Amax + Amin) = (10 - 2)/(10 + 2) = 8/12 = 2/3.

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Define modulation index. Give its physical significance. For an amplitude modulated wave, the maximum amplitude is found to be 10V while the minimum amplitude is 2V. Determine the modulation index μ.

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