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Identify the type of modulation where the modulating wave is superimposed on a high-frequency carrier wave.

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in Physics – Class 12 by (135k points)
Identify the type of modulation where the modulating wave is superimposed on a high-frequency carrier wave.

(a) Phase modulation

(b) Amplitude modulation

(c) Frequency modulation

(d) Wavelength modulation

I had been asked this question during an interview.

This intriguing question comes from Communication Systems topic in chapter Communication Systems of Physics – Class 12

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The correct choice is (b) Amplitude modulation

Easiest explanation: In Amplitude modulation, the modulating wave is superimposed on a high-frequency carrier wave such that the amplitude of the modulated wave varies as the amplitude of the modulating wave. The frequency of the modulated wave is equal to the frequency of the carrier wave.

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