Q. What happens if the input frequency is kept lower than the frequency at which the gain is zero?

A
Circuit act like a perfect integrator
B
Circuit act like a voltage follower
C
Circuit act like an inverting amplifier
D
Circuit act like a differentiator
Solution:

If the input frequency is lower that the lower frequency limit of the integrator (i.e. when gain = 0), there will be no integration results and the circuit act like a simple inverting amplifier.

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