Control Systems
The system function N(s) = V(s)/I(s) = (s+3)/(4s+5). The system is initially at rest. If the excitation i(t) is a unit step, which of the following is the final value?

 3/5
 1
 0
 1/4

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

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