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If Z(s)=1/(sC) is the driving-point impedance of an ideal capacitor, the magnitude of Z(s) as s approaches zero tends to?

  • AZero
  • BC
  • C1/C
  • DInfinity
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Correct Answer: D. Infinity
Explanation: As s approaches zero, 1/(sC) becomes unbounded, consistent with a capacitor acting as an open circuit at DC steady state.
Reference: Standard network theory: capacitor driving-point impedance
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