求题3-5-2图所示电路以uc（t)为输出变量的输入-输出方程.

A . 126e-3 B . 126（1-e-3） C . 126（1+e-3） D . 4-3e-3

A . 1 B . 0.5 C . 2 D . 0.25

A . A、A为“1” B . B、A、B、C均为“1” C . C、A、B、C均为“0” D . D、A、B为“1”，C为“0”

A . A、A为“1” B . B、A、B、C均为“1” C . C、A、B、C均为“0” D . D、A、B为“1”，C为“0”

电路如习题4-5图所示，其中R=2Ω，L=1H，C=0.01F，u_C=0，若电路的输入电流为 <img src='https://img2.soutiyun.com/ask/uploadfile/5361001-5364000/1dc19a2e7111fdeba57ad82a24868489.png' />

<img src='https://img2.soutiyun.com/ask/2020-10-07/9709100477967.png' />

<img src='https://img2.soutiyun.com/ask/2020-08-20/966770406830546.png' />

<img src='https://img2.soutiyun.com/ask/2021-01-05/978704111515359.png' /><img src='https://img2.soutiyun.com/ask/2021-01-05/978704176869097.png' />

试求题4-25图所示电路中电容电压u_c(t)在t＞0时的函数式.已知u_c(0_)=80V. <img src='https://img2.soutiyun.com/ask/2020-10-09/971120741399575.png' />

求图所示电路的微分方程。设输入为u₁(t)，输出为u₂(t)。 <img src='https://img2.soutiyun.com/ask/5523001-5526000/d863126170088b2673c4380cb6743e8b.jpg' />

试求题4-27图所示电路在开关闭合后的零状态响应i(t)(图中Us为一直流电压). <img src='https://img2.soutiyun.com/ask/2020-10-09/971121216666759.png' />

<img src='https://img2.soutiyun.com/ask/2020-07-07/962965159186717.png' /><img src='https://img2.soutiyun.com/ask/2020-07-07/962965170045339.png' />

<img src='https://img2.soutiyun.com/ask/2020-10-11/971297124258927.png' />

试求题9-12图所示电路的零状态响应i₁(t)和i₂(t). <img src='https://img2.soutiyun.com/ask/2020-10-10/971200443931704.jpg' />

求题9-17图所示电路的零状态响应i(t).要求对此电路的复频域模型用戴维宁定理求出i(t)的象函数I(s),进而求出i(t). <img src='https://img2.soutiyun.com/ask/2020-10-10/971200769947351.jpg' />

求题4-5-1图所示电路的冲激响应i(t). <img src='https://img2.soutiyun.com/ask/2020-10-09/971118180112078.jpg' />

求题4-3-1图所示电路的冲徼响应u_c(t)和i(t),并用阶跃响应的导数对所求结果予以校验. <img src='https://img2.soutiyun.com/ask/2020-10-09/971117740183915.png' />

已知电路如题7-11图所示.输入电压为u_i(t)=(10sin200t+10sin400t+10sin800t)V若要使输出电压u₀(t)中仅包含角频率为200rad/s的谐波分量,问L、C应取何值？ <img src='https://img2.soutiyun.com/ask/2020-10-10/971183075841306.jpg' />

<img src='https://img2.soutiyun.com/ask/2020-10-11/971295964907616.jpg' />

<img src='https://img2.soutiyun.com/ask/2020-12-25/97778751420716.png' />

<img src='https://img2.soutiyun.com/ask/2020-12-28/978030790456659.png' />

<img src='https://img2.soutiyun.com/ask/2020-09-16/969105779209809.png' />

<img src='https://img2.soutiyun.com/ask/2020-09-16/96910631387039.png' />