JEE Main202227 Jul 2022Evening ShiftPhysicsCommunication SystemActual
A square wave of the modulating signal is shown in the figure. The carrier wave is given by C t = 5 sin 8 π t Volt. The modulation index is
Options
- A0 . 2
- B0 . 1
- C0 . 3
- D0 . 4
Correct answer
A. 0 . 2
Step-by-step solution
Given here, C t = 5 sin 8 π t   volts. From the carrier wave equation we have, A C = 5 and from the graph we have, A m = 1 . Modulation Index μ = A m A C = 1 5 = 0 . 2 Where, A m = amplitude of modulating signal A c = amplitude of carrier wave