Control Systems
Lowest critical frequency is due to pole and it may be present at the origin or nearer to the origin, then the type of network is

 Any of the above.
 RC.
 RL.
 LC.

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

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

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