Which of the following is the disadvantage of FM over AM(a) Larger band width requirement(b) Larger noise(c) Higher modulation power(d) Low efficiency
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larger noise of fm low efficiency
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FM systems have a much wider bandwidth than AM systems and therefore more prone to selective fading.Frequency modulation requires much wider channel (7 to 15 times) as compared to AM.
Explanation: The disadvantage of FM over AM is that in frequency modulation large bandwidth is required.
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