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 . 0.5/0.2
B . 0.2/0.5
C . 0.2 × 0.5
D . 1/√(0.2 × 0.5)
Answer: Option D NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
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