##### 21. For the second order closed-loop system sh...

21. For the second order closed-loop system shown in the figure, the natural frequency (in rad/s) is

(A) 16 | |

(B) 4 | |

(C) 2 | |

(D) 1 |

Hint:

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21. For the second order closed-loop system shown in the figure, the natural frequency (in rad/s) is

(A) 16 | |

(B) 4 | |

(C) 2 | |

(D) 1 |

Hint:

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