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Network TheorySecond-Order Circuits

A series RLC circuit has L=1 H and C=0.25 F. The resistance required for critical damping is?

  • A1 ohm
  • B2 ohm
  • C4 ohm
  • D8 ohm
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Correct Answer: C. 4 ohm
Explanation: Rcrit=2sqrt(L/C)=2sqrt(1/0.25)=2×2=4 ohm.
Reference: Standard network theory: critical resistance numerical
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