Control Systems
When compared to a 1st order LPF, a 2nd order LPF has

 faster drop in filter response.
 lower voltage gain.
 higher voltage gain.
 higher cut off frequency.

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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 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.

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