In AM, the centpercent modulation is achieved when (a) Carrier amplitude = signal amplitude (b) Carrier amplitude not equal to signal amplitude (c) Carrier frequency = signal frequency (d) Carrier frequency not equal to signal frequency
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In frequency modulation (a) The amplitude of modulated wave varies as frequency of carrier wave (b) The frequency of modulated wave varies as amplitude of modulating wave (c) The frequency of modulated wave varies as frequency of modulating wave (d) The frequency of modulated wave varies as frequency of carrier wave
In amplitude modulation (a) the amplitude of the carrier varies in accordance with the amplitude of the modulating signal. (b) the amplitude of the carrier remains constant. (c) the amplitude of the carrier varies in accordance with the frequency of the modulating signal. (d) none of the above
In amplitude modulation, carrier wave frequencies are (a) lower compared to those in frequency modulation (b) higher compared to those in frequency modulation (c) same as in frequency modulation (d) lower sometimes and higher sometimes to those in frequency modulation
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