An ideal PID controller has the transfer function [1 + 1/0.55 + 0.25 ]. The freq

Question

An ideal PID controller has the transfer function [1 + 1/0.55 + 0.25 ]. The frequency at which the magnitude ratio of the controller is 1, is

Options:

A . A

B . B

C . C

D . D

Answer: Option D
Answer: (d).D

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