Control Systems
A transfer function has a zero at s = -1 and poles at s = -1 ± j1. The multiplier being unity, if the input is step function, the steady state response is given by

 0.5∠10°
 2∠90°
 1∠0°
 0.5∠0°

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Control Systems
An open loop control system, represented by the transfer function G ( s ) = ( s - 1 ) / ( s + 2 )( s + 3 ), is

  stable and of the minimum phase type.
  unstable and of the non minimum phase type .
  stable and of the non-minimum phase type.
  unstable and of the minimum phase type.

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