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Control SystemsRoot Locus

If an open-loop transfer function has 3 poles and 1 finite zero, the number of root-locus asymptotes is?

  • A1
  • B2
  • C3
  • D4
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Correct Answer: B. 2
Explanation: The number of asymptotes is n-m=3-1=2.
Reference: Standard control systems: root locus
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