Control Systems
A unity feedback control system has an open loop transfer function G(s) = k/(s(s² + 7s + 12) The gain k for which s = -1 + j1 will lie on the root locus of the system is

 5
 4
 6.5
 10

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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

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

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