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What is total modulation index when a ca...

What is total modulation index when a carrier wave is modulated by a number of sine waves having modulation index `mu_1, mu_2, mu_3, …….mu_n`?

A

`mu_(A)=mu_(1)+mu_(2)+mu_(3)+.....+mu_(n)`

B

`mu_(A)=(mu_(1)+mu_(2)+mu_(3)+.....+mu_(n))//n`

C

`mu_(A)=sqrt(mu_(1)^(2)+mu_(2)^(2)+mu_(3)^(2).....+mu_(n)^(2))`

D

`mu_(A)=(mu_(1)^(2)+mu_(2)^(2)+mu_(3)^(2)+....mu_(n)^(2))^(2)`

Text Solution

Verified by Experts

The correct Answer is:
C
If `mu_(1), mu_(2),mu_(3)....mu_(n)` is modulation index due to different sine waves then, total modulation `mu_(A)=sqrt(mu_(1)^(2)+mu_(2)^(2)+mu_(3)^(2)+........+mu_(n)^(2))`
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