Question

A carrier wave of peak voltage `12 V` is used to transmit a message signal. The peak voltage of the modulating signal in order to have a modulation index of `75%` is
A. 6V
B. 7V
C. 8V
D. 9V

Answer 1

Correct Answer - D
Here `A_(c)=12V,mu=75%=0.75`
As `m u=(A_(m))/(A_(c))` or `A_(m)=muxxA_(c)=9V`