Control Systems
For a second order under damped system subjected to unit step input the time response has first peak value to be 4 times the second over shoot. Determine the damping ratio ξ ?

 0.087
 0.87
 0.07
 0.707

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

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