在题6-13图电路中，开关S闭合于1端已经很久，t=0时开关S由1端接至2端，求t＞0的电容电压uc（t)和电

A . 6.67（1-） B . 10V C . 10（1-） D . 6.67+3.33

A .https://assets.asklib.com/psource/2015110111313843578.jpg B .https://assets.asklib.com/psource/2015110111315151618.jpg C .https://assets.asklib.com/psource/2015110111320582310.jpg D .https://assets.asklib.com/psource/2015110111323019711.jpg

A .https://assets.asklib.com/psource/2015110111290284798.jpg B .https://assets.asklib.com/psource/201511011129155823.jpg C .https://assets.asklib.com/psource/2015110111293084231.jpg D .https://assets.asklib.com/psource/2015110111294629263.jpg

A . 0 B . 0.6 C . 0.3 D . 0.03

A . 2.5 B . -2 C . 2 D . -2.5

<img src='https://img2.soutiyun.com/ask/2020-06-17/961264067053561.png' />

<img src='https://img2.soutiyun.com/shangxueba/ask/18495001-18498000/18496804/2015110114005030374.jpg' /> A．0 B． 0.6 C． 0.3 D． 0.03

<img src='https://img2.soutiyun.com/shangxueba/ask/18381001-18384000/18381704/2015110111311967106.jpg' /> A．<img src='https://img2.soutiyun.com/shangxueba/ask/18381001-18384000/18381704/2015110111313843578.jpg' /> B．<img src='https://img2.soutiyun.com/shangxueba/ask/18381001-18384000/18381704/2015110111315151618.jpg' /> C．<img src='https://img2.soutiyun.com/shangxueba/ask/18381001-18384000/18381704/2015110111320582310.jpg' /> D．<img src='https://img2.soutiyun.com/shangxueba/ask/18381001-18384000/18381704/2015110111323019711.jpg' />

<img src='https://img2.soutiyun.com/ask/2020-10-10/9711752938202.jpg' />

<img src='https://img2.soutiyun.com/shangxueba/ask/18525001-18528000/18526549/201511011401317578.jpg' /> A．2.5 B． -2 C． 2 D． -2.5

<img src='https://img2.soutiyun.com/ask/2020-10-07/970928095949995.png' />

在题6.8图所示电路中,求开关S闭合瞬间t(=0)电路小的电压u_C、u_L。 <img src='https://img2.soutiyun.com/ask/2020-10-07/970927159291421.png' />

图示电路在开关S闭合前电路已处于稳态，在t=0时刻开关闭合。试求开关闭合后的u_C(t)及i_L(t)。 <img src='https://img2.soutiyun.com/ask/2020-11-30/975606777612099.png' />

图3-19所示电路中开关S1在t=0时闭合，开关S2在t=1s时闭合，试用阶跃函数表示电流i(t)。 <img src='https://img2.soutiyun.com/ask/uploadfile/5493001-5496000/006c63b713099b96077658762cacfaf9.png' />

题图8-10所示电路中，开关闭合已经很久，t=0时断开开关，试求t>0的电阻电流i(t)。 <img src='https://img2.soutiyun.com/ask/2020-07-07/962962316576129.png' />

图4-4所示电路,t=0时,开关S闭合,求v_c(t). <img src='https://img2.soutiyun.com/ask/2020-12-01/975674141499809.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' />

<img src='https://img2.soutiyun.com/shangxueba/ask/18498001-18501000/18500204/2015110114043515136.jpg' /> A．0 B． -5 C． 5 D． 10

<img src='https://img2.soutiyun.com/shangxueba/ask/18498001-18501000/18500196/2015110114041431885.jpg' /> A．2s B． 0.5s C． 50ms D． 1s

A．6V B．4V C．0V D．8V

在图1-77所示电路中，已知U=12V，R1=6Ω，R2=2Ω，L=0.2H。当t=0时开关S闭合，把电阻R1短接，问短接后需经多少时间电流才达到4.5A。(在t<0时电路已达稳态。) <img src='https://img2.soutiyun.com/ask/2020-06-11/960742159191536.png' />

电路如题图8-12所示，开关断开已经很久，t=0时闭合开关，试求t≥0时的电容电压uC(t)。 <img src='https://img2.soutiyun.com/ask/2020-07-07/962962362290744.png' />

<img src='https://img2.soutiyun.com/ask/2020-10-07/97092736294907.png' />