An audio signal is represented as 25sin2π(2000t) and the amplitude is modulated by a carrier wave 60sin2π(100000t). The % of modulation index of the modulated signal is
A
25%
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B
41.6%
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C
50%
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D
72%
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Solution
The correct option is B41.6% Modulation index = amplitude of audio signals/amplitude of carrier wave =(25/60)×100=41.6%