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Network TheorySecond-Order Circuits

For a series RLC circuit, critical damping occurs at resistance R equal to?

  • Asqrt(L/C)
  • B2sqrt(L/C)
  • Csqrt(C/L)
  • D2sqrt(C/L)
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Correct Answer: B. 2sqrt(L/C)
Explanation: Critical damping requires R/(2L)=1/sqrt(LC), which gives R=2sqrt(L/C).
Reference: Standard network theory: critical resistance
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