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Discussion

For type 2 system, the magnitude and phase angle of the term (jω)2 in the denominator, at ω = 0, are respectively

  • A.
    0 and - 90°
  • B.0 and + 90°
  • C.infinity and - 180°
  • D.infinity and + 180°

Answer: C

If ω = 0,  has a magnitude of infinity and phase angle -180°.

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