5418Chemical EngineeringMedium
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________?
A0.2/0.5
B1/√(0.2 × 0.5)
C0.5/0.2
Correct answer
B. 1/√(0.2 × 0.5)
Explanation
The correct answer is 1/√(0.2 × 0.5).