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JEE Main 27 July 2022, Shift 2, Physics Q50

Question 50 of 90 in this shift, Physics question 20 of 30, Section A.

A square wave of the modulating signal is shown in the figure. The carrier wave is given by

C(t)=5\sin(8\,\pi t)

Volt. The modulation index is :

The figure, in words

Graph of m(t) in Volt vs t: square wave alternating between +1 V and -1 V, switching at t = 0.5, 1, 1.5, 2, 2.5 (+1 for 0-0.5, -1 for 0.5-1, +1 for 1-1.5, -1 for 1.5-2, +1 for 2-2.5).

(1)0.2Official answer
(2)0.1
(3)0.3
(4)0.4

Official answer

Option 1

NTA final key.

Chapter: Communication Systems
Topic: No close match in our taxonomy
Idea tested: No close match in our taxonomy