Control Systems
The phase of lead compensator of the system G ( s ) = ( s + a ) / ( s + b ) is at its maximum at:

  √( ab ).
  a / b.
 √( a / b).
  ab.

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

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