A) twice the audio signal frequency
B) thrice the audio signal frequency
C) thrice the carrier wave frequency
D) twice the carrier wave frequency
E) sum of audio signal frequency and carrier wave frequency
Correct Answer: A
Solution :
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\[=({{f}_{c}}+{{f}_{m}})-({{f}_{c}}-{{f}_{m}})=2{{f}_{m}}\] Band width\[=2\times \]audio signal frequency
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