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Network TheorySecond-Order Circuits

For an underdamped second-order network, the damped natural frequency omega_d equals?

  • Aalpha+omega0
  • Bsqrt(omega0^2-alpha^2)
  • Csqrt(alpha^2+omega0^2)
  • Domega0/alpha
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Correct Answer: B. sqrt(omega0^2-alpha^2)
Explanation: For alpha<omega0, the oscillatory frequency is omega_d=sqrt(omega0^2-alpha^2).
Reference: Standard network theory: damped natural frequency
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