Control Systems
A unity feed back system has forward transfer function The range of k for the system to be stable is

 0 < k < 390.
 0 < k < 39.
None of these
 0 < k < 3900.

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

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