An AM wave is given by s(t) = 20(1+0.5 Cos cos cos 106t), the modulation index of the envelope is ?

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Ravi Shankar

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Q. An AM wave is given by s(t) = 20(1+0.5 Cos cos cos 106t), the modulation index of the envelope is ?

(A) 0.5
(B) 0.58
(C) 0.3
(D) 0.8

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✅ Correct Answer: (B) 0.58

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