The identical first order system have been cascaded non-interactively. The unit step response of the systems will be:(a) Overdamped(b) Underdamped(c) Undamped(d) Critically dampedI had been asked this question in unit test.I'd like to ask this question from Time Domain Analysis in section Stability in Frequency Domain of Control Systems

The identical first order system have been cascaded non-interactively.

1.	The identical first order system have been cascaded non-interactively. The unit step response of the systems will be:(a) Overdamped(b) Underdamped(c) Undamped(d) Critically dampedI had been asked this question in unit test.I'd like to ask this question from Time Domain Analysis in section Stability in Frequency Domain of Control Systems
Answer» Right answer is (d) CRITICALLY DAMPED To explain I WOULD SAY: Since both the SYSTEMS that is the first order systems are cascaded non-interactively, the overall unit step response will be critically damped.

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