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The time constant of a unity gain, first order plus time delay process is 5 min. If the phase lag at a frequency of 0.2 rad/min is 60°, then the dead time (in minutes) is | |
A. | 5π/12 [Correct Answer] |
B. | π/6 [Wrong Answer] |
C. | π/12 [Wrong Answer] |
D. | π/3 [Wrong Answer] |