In amplitude modulation, the magnitude of carrier wave is varied
| In amplitude modulation, the magnitude of carrier wave is varied in accordance with the amplitude and frequency of the:
A. modulating voltage
B. any voltage
C. both 1) and 2)
D. none of the above
Please scroll down to see the correct answer and solution guide.
Right Answer is: A
SOLUTION
In amplitude modulation, input signal is added to the pure carrier wave, it will thereby change the frequency of the carrier wave.
The equation of sinusoidal AM modulated wave is:
\(c\left( t \right) = {A_c}\left( {1 + \mu \;{\rm{cos}}{\omega _m}t} \right)\cos {\omega _c}t\)
From the above signal the magnitude of carrier wave is Ac(1 + μ cos ωmt) which depends on modulating signal.
