An amplitude modulated signal is given by. |
Here t is in seconds. The side band frequencies [JEE Main 11-Jan-2019 Morning] |
(in kHz) are, [Given ] |
A) 178.5 and 171.5
B) 89.25 and 85.75
C) 1785 and 1715
D) 892.5 and 857.5
Correct Answer: B
Solution :
[b] The equation for a amplitude modulated wave is |
Comparing it with given equation, |
So, the side band frequency, |
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