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Question

Differentiate between amplitude modulation and frequency modulation (any four)

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Solution

Difference between amplitude modulation and frequency modulation:
Sl No Amplitude modulation Frequency modulation
1In this modulation amplitude of carrier wave is changed in accordance with basic voice frequency of Modulating signal.Frequency of carrier wave is changed in accordance with basic voice frequency of modulating signal.
2The process of amplitude modulation produces two side band frequencies corresponding to original carrier frequency.FM wave consists of a carrier and in infinite number of pair of side bands.
3Amplitude modulation is more likely to suffer from noise.FM is free from effects of noise.
4Apparatus used in AM are simple and cheaper
Apparatus are complex and costly.

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