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Question:

A signal of 5kHz frequency is amplitude modulated on a carrier wave of frequency 2MHz. What are the frequencies of the sidebands produced?

Solution:

Given - fm = 5kHz, fc = 2MHz = 2000kHz
Now frequency of upper side band , fc + fm = 2000 + 5 = 2005kHz
frequency of lower side band , fc - fm = 2000 - 5 = 1995kHz