Q. In amplitude modulation, the bandwidth is
A) Twice the audio signal frequency
B) Thrice the audio signal frequency
C) Thrice the carrier wave frequency
D) Sum of audio signal frequency and carrier wave frequency
Explanation
(a) In amplitude modulation, Bandwidth $v_{USB} - v_{LSB}$
$= \left( v_{c} + v_{m} \right) - \left( v_{c} - v_{m} \right) = 2v_{m}$
$\therefore$ Bandwidth = Twice the frequency of modulating signal frequency
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.