Q. The audio signal used to modulate $60\sin{(2\pi \times 10^{6}\ t)}$ is $15\sin{300\pi t}$. The depth of modulation is
A) 50%
B) 40%
C) 25%
D) 15%
Explanation
(c) $m_{a} = \frac{E_{m}}{E_{c}} = \frac{15}{60} \times 100 = 25\%$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.