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An RC coupled amplifier has an open loop gain of 200 and a lower cutoff frequency of 50 Hz. If negative feedback with β = 0.1 is used, the lower cut off frequency will be

/ Analog Electronics, Electronics And Communication Engineering / By
Question: An RC coupled amplifier has an open loop gain of 200 and a lower cutoff frequency of 50 Hz. If negative feedback with β = 0.1 is used, the lower cut off frequency will be
[A].

about 50 Hz

[B].

about 5 Hz

[C].

about 2.38 Hz

[D].

about 70.5 Hz

Answer: Option C

Explanation:

New lower cutoff frequency = .