A third order system is approximated to an equivalent second order system. The rise time of this approximated lower order system will be:
(a) Same as the original system for any input
(b) Smaller than the original system for any input
(c) Larger than the original system for any input
(d) Larger or smaller depending on the input
I had been asked this question during an online exam.
The question is from Time Domain Analysis topic in portion Stability in Frequency Domain of Control Systems