If the bandwidth is increased by 2, the γFM γAM (where γ is the ratio of SNR of output to SNR at input, FM is frequency modulation and AM is amplitude modulation) is increased by a factor of

1. 

If the bandwidth is increased by 2, the γFM γAM (where γ is the ratio of SNR of output to SNR at input, FM is frequency modulation and AM is amplitude modulation) is increased by a factor of
[A]. 2
[B]. 3
[C]. 4
[D]. 6

Answer: Option C

Explanation:

Doubling of frequency increase SNR in frequency modulation by 4. It has no effect in AM.

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