The time constant of a unity gain, first order plus time delay process is 5 min.

Question

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________________?

Options:

A . 5π/12

B . π/6

C . π/12

D . π/3

Answer: Option A
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