阿摩線上測驗
18. The RC circuit shown in the figure $(\mathrm{R} = 100\Omega, \mathrm{C} = 10\mu \mathrm{F})$ is called a low-pass filter because it passes low-frequency AC signals with less attenuation than high-frequency signals. The frequency at which the voltage ratio $\mathrm{A} = \mathrm{v_{out}} / \mathrm{v_{in}}$ drops to $1 / \sqrt{2}$ of its maximum value is known as cutoff frequency. What is the cutoff frequency of this circuit?
(A) $159.2\mathrm{Hz}$
(B) $1\mathrm{kHz}$
(C) $6.28\mathrm{kHz}$
(D) $1.59\mathrm{MHz}$
(E) $10\mathrm{MHz}$
答案：登入後查看
統計： 尚無統計資料
統計： 尚無統計資料
