Multiple Choice QuestionsIn amplitude modulation, the bandwidth is
twice the audio signal frequency
thrice the audio signal frequency
thrice the carrier wave frequency
twice the carrier wave frequency
A.
twice the audio signal frequency
Modulation is a process of superposing a low frequency audio signals (called modulating signal) on a high frequency radio wave called carrier wave.
Band width = (fc + fm) − (fc − fm) = 2 fm
Band width = 2 × audio signal frequency
The principle of superposition is basic to the phenomenon of
total internal reflection
interference
reflection
refraction
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