Process Control and Instrumentation
In a second order under damped system, the

Overshoot (which is a measure of how much the response exceeds the ultimate value) increase with the decrease of damping co-efficient e
None of these
Decay ratio (which is the ratio of the sizes of successive peaks) is equal to the reciprocal of overshoot
Time required for the response of first reach its ultimate value is called the response time

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