Given that the maximum gain of a low pass filter using op-amp is 5.5 and the resistor R1 = 10kΩ, find the value of R2.(a) 220kΩ(b) 55kΩ(c) 50Ω(d) -55kΩI have been asked this question by my college professor while I was bunking the class.I would like to ask this question from Frequency Filters topic in division Op-amps and its Applications of Analog Circuits

Given that the maximum gain of a low pass filter using op-amp is 5.5 a

1.	Given that the maximum gain of a low pass filter using op-amp is 5.5 and the resistor R1 = 10kΩ, find the value of R2.(a) 220kΩ(b) 55kΩ(c) 50Ω(d) -55kΩI have been asked this question by my college professor while I was bunking the class.I would like to ask this question from Frequency Filters topic in division Op-amps and its Applications of Analog Circuits
Answer» Correct answer is (b) 55kΩ For explanation I would SAY: The MAXIMUM GAIN is at LOW frequencies and at low frequencies, the capacitance reactance is infinite and thus the total feedback impedance ZF = RF = R2 Thus gain = -ZF/Z = -R2/R1 Amplitude = 5.5 = R2/R1 = R2/10k R2 = 55kΩ.

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