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Write two basic modes of communication. Explain the process of amplitude modulation. Draw a

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Write two basic modes of communication. Explain the process of amplitude modulation. Draw a schematic sketch showing how amplitude modulated signal is obtained by superposing a modulating signal over a sinusoidal carrier wave.

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Two basic modes of communication are :

(i) Point - to - point

(ii) Broadcast

 In amplitude modulation, the amplitude of a carrier wave is made to vary, with time, in the same way as the modulating signal varies with time.

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