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← JEE Main 2022 · 27 Jul · Shift 2
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JEE Main 2022 · 27 Jul · Shift 2, Physics question 50

A square wave of the modulating signal is shown in the figure. The carrier wave is given by C(t) = 5 sin(8πt) Volt. The modulation index is :

m(t) in volt against t: a square wave between +1 and −1 V, switching every 0.5 s (marks at 0.5, 1, 1.5, 2, 2.5).
Choose one option
Answer and worked solution

Official answer: A

Index AmAc=15=0.2\frac{A_m}{A_c}=\frac15=0.2.

(A)

Topics:Modulation
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