複選題
22. Consider a damped harmonic oscillator, which of the following is true?
(A) If it is underdamped, the resonant frequency increases with larger damping；
(B) If it is underdamped, the amplitude decays faster with larger damping；
(C)If it is underdamped, and is driven by an external sinusoidal force, the amplitude of the oscillation is maximum if the frequency of the force is the same as the resonance frequency；
(D) In order to damp the kinetic energy and the elastic energy as fast as possible, one should design the oscillator to be at critical damping condition；
(E) If it is overdamped, the system does not oscillate and returns to the equilibrium position slowly.

答案：登入後查看
統計： A(1), B(1), C(1), D(3), E(2) #2740300

助人為本

B1 · 2026/07/05

#7430941

所以這題要先搞懂阻尼震盪器有三種

一種是欠阻尼(underdamped)

第二是critical damping(臨界阻尼)

第三是overdamped(過阻尼)

這題只要記住三個結論就是

欠阻尼的角頻率公式

欠阻尼震盪的振幅衰減公式

ㅤㅤ

所以只要記住三個結論

欠阻尼:會震盪、震幅會衰減

臨界阻尼:最快回到平衡點，不震盪

過阻尼:不震盪，但回覆到平衡點慢