Answer:
(i) When the size of the antenna is com- parable to wavelength of the signal, the time variations of the signal are properly sensed by the antenna. (ii) An e. m. wave, of audio signal frequency, would have a very high wavelength. It would, therefore, need an antenna, whose size would be practically unattainable. (iii) The amplitude of modulating signal is kept less than the amplitude of carrier wave to avoid distortion.
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