GATE EC 2016 Set 1 — Question 33

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NAT+1 / -0EasyAM Modulation & DemodulationAnalog CommunicationsCommunications

Communications → Analog Communications → AM Modulation & Demodulation

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The amplitude of a sinusoidal carrier is modulated by a single sinusoid to obtain the amplitude modulated signal s(t)=5cos1600πt+20cos1800πt+5cos2000πts(t) = 5 \cos 1600\pi t + 20 \cos 1800\pi t + 5 \cos 2000\pi t. The value of the modulation index is __________
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