In AM, the centpercent modulation is achieved when
A
Carrier amplitude = signal amplitude
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B
Carrier amplitude ≠ signal amplitude
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C
Carrier frequency = signal frequency
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D
Carrier frequency ≠ signal frequency
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Solution
The correct option is A Carrier amplitude = signal amplitude When signal amplitude is equal to the carrier amplitude, the amplitude of carrier wave varies between 2A and zero. ma=AmplitudechargeofcarrierAmplitudeofnormalcarrier=2A−AA×100=100%