Control Systems
The second order system defined by 25/(s2 + 5s + 25) is given a step input. The time taken for the output to settle with in 2 % of input is

 2 sec.
 1.6 sec.
 0.4 sec.
 1.2 sec.

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Control Systems
In the integral control of the single area system frequency error is reduced to zero. Then

 integrator o/p decreases and speed changer position comes down.
 integrator o/p increases but speed changer position comes down.
  integrator output and speed changer position attain a constant value.
 integrator o/p decreases but speed changer position moves up.

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