17. A 1.2 mF capacitor is connected across a generator whose output is V = Vosin(2πft), with Vo = 20 V, f = 60 Hz, and t in seconds. Find the peak current and absolute value of the current at t = 5ms.(A) 9.05A, 2.80A； (B) 9.05A, 1.80A； (C)1.44A, 0.45A； (D) 1.44A, 0.25A； (E) 9.05A, 8.61A.

17. A 1.2 mF capacitor is connected across a generator whose output is V = V_osin(2πft), with Vo = 20 V, f = 60 Hz, and t in seconds. Find the peak current and absolute value of the current at t = 5ms.
(A) 9.05A, 2.80A；
(B) 9.05A, 1.80A；
(C)1.44A, 0.45A；
(D) 1.44A, 0.25A；
(E) 9.05A, 8.61A.

答案：登入後查看
統計： A(2), B(0), C(0), D(1), E(0) #2740295

詳解 (共 1 筆)

助人為本

B1 · 2026/07/05

#7430751

所以這題要搞懂電容交流電流峰值

然後代入題目給的數值

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.

17. A 1.2 mF capacitor is connected across a generator whose output is V = V_osin(2πft), with Vo = 20 V, f = 60 Hz, and t in seconds. Find the peak current and absolute value of the current at t = 5ms.
(A) 9.05A, 2.80A；
(B) 9.05A, 1.80A；
(C)1.44A, 0.45A；
(D) 1.44A, 0.25A；
(E) 9.05A, 8.61A.

詳解 (共 1 筆)

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