Question

The maximum amplitude of an AM wave is found to be 15 V while its minimum amplitude is found to be 3 V.What is the modulation index?

Answer 1

Correct Answer - B::C
Modulation index `mu`,
`=(A_(max) - A_(min))/(A_(max)+ A_(min)`
(A = amplitude of modulated wave)
`:. mu=(15-3)/(15+3)=(12)/(18)=2/3`.