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JEE Main 2021 · 24 Feb · Shift 1, Physics question 27

An audio signal vm=20sin⁡2π(1500t)v_m=20\sin2\pi(1500t) amplitude modulates a carrier vc=80sin⁡2π(100,000t)v_c=80\sin2\pi(100{,}000t).

The value of percent modulation is _______.

Answer and worked solution

Official answer: 25

Modulation index 2080=0.25\frac{20}{80}=0.25, i.e. 25%.

Answer: 25

Topics:Modulation
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