如题20图所示电路中uS（t）为非正弦周期电压，其中含有的谐波分量。如果要求在输出电压u（t）中不含这两个谐波分量，则电路中的L和C应为（）。https://assets.asklib.com/psource/2015110209492414557.jpg

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

A . 0.8 B . 0.4 C . 0.5 D . 0.3

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

A . 0.25 B . 0.5 C . 2 D . 4

A . ['https://assets.asklib.com/psource/2015110109410226764.jpg B .https://assets.asklib.com/psource/2015110109403910982.jpg

A . 50 B . 40 C . 30 D . 45

A .https://assets.asklib.com/psource/2015110210080044679.jpg B .https://assets.asklib.com/psource/2015110210081734981.jpg C .https://assets.asklib.com/psource/2015110210084176170.jpg D .https://assets.asklib.com/psource/2015110210085633824.jpg

A . 超前30° B . 超前60° C . 超前30° D . 超前60°

A．<img src='https://img2.soutiyun.com/latex/latex.action' /> B．<img src='https://img2.soutiyun.com/latex/latex.action' /> C．110V D．220V <img src='https://img2.soutiyun.com/ask/5451001-5454000/d42e728a39bc016169f4ef76bc68bf63.jpg' />

<img src='https://img2.soutiyun.com/ask/2020-10-07/970922848041832.png' />

如题5-12图所示RLC电路，己知Us(t)=5ω(t)，i(0)=2A, u(0 )=2V。试用S域方法求全响应U(t)。 <img src='https://img2.soutiyun.com/ask/2020-07-10/963223214157704.png' />

题图10-50所示单口网络工作于正弦稳态，已知us(t)=<img src='https://img2.soutiyun.com/ask/2020-07-07/96297017944186.png' />试求单口网络的戴维宁等效电路。 <img src='https://img2.soutiyun.com/ask/2020-07-07/962970193210647.png' /><img src='https://img2.soutiyun.com/ask/2020-07-07/962970201021094.png' /><img src='https://img2.soutiyun.com/ask/2020-07-07/962970211392687.png' />

<img src='https://img2.soutiyun.com/ask/uploadfile/5364001-5367000/2968ad2b913847aaeafa85b7fd6637c5.jpg' />

电路如题6-4图所示，已知电感电流iL(0_)=0，t=0时闭合开关，求t≥0的电感电流和电感电压。 <img src='https://img2.soutiyun.com/ask/2020-08-20/966784685280226.png' />

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' />

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' />

A．60V B．90V C．120V D．30V

<img src='https://img2.soutiyun.com/shangxueba/ask/17868001-17871000/17868888/2015110209513078451.jpg' /> A．0.25 B． 0.5 C． 2 D． 4

A．甲类状态 B．乙类状态 C．丙类状态 D．甲乙类状态

A．0.375A B．0.25A C．0.125A D．0.1875A

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' />

A．工作在甲乙类状态 B．电路会出现交越失真 C．负载上可能得到的最大输出功率 D．电路的最大效率η=π/4

<img src='https://img2.soutiyun.com/ask/2020-12-29/978113649236104.png' />

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