A carrier wave is modulated by n number of sine waves with modulation indices `mu_(1),mu_(2),mu_(3)+`.... The total modulation index `(mu)` of the wave is

Options

A. `mu_(1)+mu_(2)+mu_(3)+`....
B. `sqrt(u_(1)^(2)+mu_(2)^(2)+mu_(3)^(2)+....)`
C. `[(mu_(1)^(2)+mu_(2)^(2)+mu_(3)^(3)+....)/(n)]^(1//2)`
D. `[(n)/(mu_(1)^(2)+mu_(2)^(3)+mu_(3)^(2)+......)]^(1//2)`

Explanation

The total amplitude modulation index when a carrier wave is modulated by several sine waves simultaneously is given by
`musqrt(mu_(1)^(2)+mu_(2)^(2)+mu_(3)^(2)+....)`.