Control Systems
When the polynomial is Routh Hurwitz,

 the roots of function have real parts which are to be zero/negative.
 all zeroes lie in the right half of the s-plane.
 the function is not real.
 none of these.

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

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