Question

In AM modulation, a signal is modulated on a carrier wave such that maximum and minimum amplitude are found to be $6 V$ and $2 V$ respectively The modulation index is

• A. $100 \%$
• B. $80 \%$
• C. $60 \%$
• D. $50 \%$

Answer 1

Answer: (D)

$50 \%$

Answer 2

modulation index =Vmax​+Vmin.​Vmax​−Vmin.​​×100%
=6+26−2​×100%=50%