图题8-30所示电路在所示开关位置已工作于稳态。当u（t)达到正的最大值时,开关投向b.并以此为计算

A . 3.5 B . 5.0 C . 5.5 D . 10

A . 4.5-0.5https://assets.asklib.com/psource/2015102909090699957.jpg A.B . 4.5-4.5https://assets.asklib.com/psource/2015102909090699957.jpg A.C . 3+0.5https://assets.asklib.com/psource/2015102909090699957.jpg A.D . 4.5-0.5https://assets.asklib.com/psource/2015102909090699957.jpg A.

A . A B . B C . C D . D

A . ['['L/R3B .https://assets.asklib.com/psource/2015110111201458733.jpg C .https://assets.asklib.com/psource/2015110111202959174.jpg D .https://assets.asklib.com/psource/201511011120497322.jpg

A .https://assets.asklib.com/psource/201511020947074085.jpg B .https://assets.asklib.com/psource/2015110209472042024.jpg C .https://assets.asklib.com/psource/2015110209473654095.jpg D .https://assets.asklib.com/psource/2015110209474940538.jpg

如图5.4.10所示电路中，t＜0时，电路已处于稳态，t=0时开关闭合，求t≥0₊时ic(t)。 <img src='https://img2.soutiyun.com/ask/2020-02-27/951671752554798.jpg' />

图题6-14所示电路中电源u_s(t)系一脉冲电压,该电压于t=0时作用于电路,持续1ms,在持续期间脉冲幅度为30V,试求i(t). <img src='https://img2.soutiyun.com/ask/2020-10-15/971628373938237.jpg' />

-1A 2A 1A 0A

<img src='https://img2.soutiyun.com/ask/2020-10-07/970927824241454.png' />

试用网孔分析求解图题8-10所示电路中的正弦稳态电流i₁(t)和i₂(t)。已知u_s(t)=9cos(5t)V。 <img src='https://img2.soutiyun.com/ask/2020-08-27/967411508475994.png' />

<img src='https://img2.soutiyun.com/ask/2020-04-24/95659677385984.png' />

<img src='https://img2.soutiyun.com/ask/2020-07-24/96445118331937.png' />

<img src='https://img2.soutiyun.com/ask/2020-08-28/967474712387309.png' />

电路如图题6-33所示,求<img src='https://img2.soutiyun.com/ask/2020-10-15/971631143700658.png' /><img src='https://img2.soutiyun.com/ask/2020-10-15/971631160210602.png' />已知开关在t=0时闭合,闭合前电路已处于稳态. <img src='https://img2.soutiyun.com/ask/2020-10-15/971631172391299.png' />

图题11-3所示电路中,已知<img src='https://img2.soutiyun.com/ask/2020-07-24/964450491997828.png' />,试求输出电压u(t)。 <img src='https://img2.soutiyun.com/ask/2020-07-24/964450470432595.png' />

电路如图所示，Is=3A，Us=18V，R1=3Ω，R2=6Ω，L=2H，在t＜0时电路已处于稳态。当t=0时开关S闭合，求t≥0时的i_L、u和i(t)。 <img src='https://img2.soutiyun.com/ask/uploadfile/5499001-5502000/c59f97db78e22204b83620ad1e292af9.jpg' />

题5.6图所示电路已处于稳态，当t=0时开关S由a切换至b，求t≥0时电流i₂(t)，并画出波形图。 <img src='https://img2.soutiyun.com/ask/2020-09-17/969188809236656.png' />

电路如题6-17图所示，在t＜0时.电路已处于稳态，t=0时开关S由1端接至2端，求t＞0时的电容电压u_c(t)。 <img src='https://img2.soutiyun.com/ask/2020-08-20/966785880595594.png' />

试求图题12-6所示电路的冲激响应h(t)=u(t)，并求u(0₊)，如发生跃变，试解释之。 <img src='https://img2.soutiyun.com/ask/2020-09-01/967819384556862.png' />

电路如图题7-1所示,开关在t=0时打开,打开前电路已处于稳态.求<img src='https://img2.soutiyun.com/ask/2020-10-15/971634467034742.jpg' />. <img src='https://img2.soutiyun.com/ask/2020-10-15/971634480570516.jpg' />

<img src='https://img2.soutiyun.com/ask/2020-07-24/964433301424584.png' />

图题6-29所示电路求u(0₊)和i(0₊)。开关闭合前电路巳达稳定状态。 <img src='https://img2.soutiyun.com/ask/2020-08-25/967213871324995.png' />