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Network TheorySecond-Order Circuits

For a series RLC circuit, the condition R^2<4L/C corresponds to which natural-response type?

  • AOverdamped
  • BCritically damped
  • CUnderdamped
  • DFirst-order
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Correct Answer: C. Underdamped
Explanation: For series RLC, alpha=R/(2L) and omega0=1/sqrt(LC). The inequality R^2<4L/C is equivalent to alpha<omega0, giving an underdamped response.
Reference: Standard network theory: RLC damping condition
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