Control Systems
The phase of lead compensator of the system G ( s ) = ( s + a ) / ( s + b ) is at its maximum at:

  ab.
  √( ab ).
  a / b.
 √( a / b).

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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 decreases but speed changer position moves up.
 integrator o/p increases but speed changer position comes down.

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