|
|
A:A
B:B
C:C
D:D
<div align="left">8-1 图中所示电路<span>L=0.2H,R=2</span><span>Ω</span>,求冲击响应<span>i为（<span> </span>） </span>。</div><div align="left"> </div><div>A 5e<sup>-t</sup>1(t)A<span> B 0 C</span>其它</div><div><img alt="" width="202" height="122" src="http://file.open.com.cn/ItemDB/88702/09a8c6fb-3dad-4685-8541-2e7b761a80af/201112992157242.JPG" /></div>
A:A
B:B
C:C
D:D
<div>图中<span>t</span><span>³</span>0时<span>u<sub>c</sub>(t)为(<span> )</span>。</span></div><div>A u(t)=12e<sup>-0.25t </sup><span> B u(t)=12-12e<sup>-0.25t</sup> C </span>其它</div><div><img height="227" width="314" alt="" src="http://file.open.com.cn/ItemDB/88702/919e2371-76e2-479e-aca1-ad80c7ff1b91/20111281118398.JPG" /></div>
A:A
B:B
C:C
D:D
<div>图中<span>t</span><span>³</span>0时<span>i<sub>L</sub>(t) 为(<span> )</span>。</span></div><div>A i<sub>L</sub>(t)=3e<sup>-4t </sup><span> B i<sub>L</sub>(t)=3-3e<sup>-4t</sup> C </span>其它</div><div><img height="214" width="324" alt="" src="http://file.open.com.cn/ItemDB/88702/9fc324a9-266f-4a36-8cf1-c0cea1adc304/201112811174784.JPG" /></div>
A:A
B:B
C:C
D:D
<div align="left">图中所示电路<span>C=0.1F,R=10</span><span>Ω</span>,求冲击响应<span>i为（<span> </span>） </span>。</div><div align="left"> </div><div>A 0.1<span>d</span>(t)-0.1e<sup>-t</sup>1(t)A<span> B -0.1e<sup>-t</sup>1(t)A C</span>其它</div><div><img alt="" width="202" height="122" src="http://file.open.com.cn/ItemDB/88702/312bac90-d018-482a-b489-7ba3ba1b438b/201112992414229.JPG" /></div>
A:A
B:B
C:C
D:D
<div align="left">R=15<span>Ω</span>, <span>L=0.3mH, C=0.2mF,U=5V,f=3</span><span>*</span>10<sup>4</sup>Hz .电流i=0.3Sin(18.8495t-34<span>°</span>)A <sub> </sub>。（<span><span> </span>）</span></div><div align="left"><span></span></div><div align="left"><span><img alt="" width="255" height="166" src="http://file.open.com.cn/ItemDB/88702/073de356-97d6-4bd9-b887-6f07bcf59451/20111269713662.JPG" /></span></div>
A:错误
B:正确
<div align="left">图中电位<span>U<sub>b</sub>=4.4V。(<span> )</span></span></div><div align="left"><span><span></span></span></div><div align="left"><span><span><img height="212" width="350" alt="" src="http://file.open.com.cn/ItemDB/88702/c60693a4-5af3-4277-8a14-8ddfdf221eb6/201112510205373.JPG" /></span></span></div>
A:错误
B:正确
<div>含非正弦的非线性电路中的电压或电流的求解可以直接应用叠加定理求解。<span>(<span> )</span></span></div>
A:错误
B:正确
<div align="left">图中电位<span>U<sub>a</sub>=-4.4V 。(<span> )</span></span></div><div align="left"><span><span></span></span></div><div align="left"><span><span></span></span></div>
A:错误
B:正确
正弦电路的平均功率P=UIcosj。( )
A:错误
B:正确
<div align="left">图中<span> U</span><sub>S</sub>=10V, R=10Ω, I<sub>S</sub>=-1A。则电流<span>I=1A 。(<span> )</span></span></div><div align="left"><span><span></span></span></div><div align="left"><span><span><img height="177" width="255" alt="" src="http://file.open.com.cn/ItemDB/88702/f412761b-83ab-4bc6-be85-c3dd7607f225/201112415506944.JPG" /></span></span></div>
A:错误
B:正确
正弦电路的平均功率P=UIcosj。( )
A:错误
B:正确
<div align="left">已知 R<sub>1</sub>=<span>R</span><sub>2</sub>=1Ω, <span>L</span><sub>1</sub>=1H, <span>C=1</span>F。若激励是 <span>d</span>(<span>t)</span>，响应是u<sub>2</sub>(<span>t)</span>，网络函数H(S)=1/(S<sup>2</sup>+2S+2)（<span><span> </span>）。</span></div><div align="left"> <img height="179" width="330" alt="" src="http://file.open.com.cn/ItemDB/88702/0d102e5a-530c-4612-84e1-4fa5c3c719d7/201112993223320.JPG" /></div>
A:错误
B:正确
<div align="left">电路中的开关断开已经很久，<em>t</em>=0时闭合开关，电压u<sub>1</sub>(0)=1V 。(<span> )</span></div><div align="left"> <img height="156" width="324" alt="" src="http://file.open.com.cn/ItemDB/88702/cea2c96b-f8e4-4cba-8353-2fbf7514ea1b/2011128112757104.JPG" /></div>
A:错误
B:正确
<div>图中复阻抗<span>Y=1/R+1/(j</span><span>w</span>L)+j<span>w</span>C。<span>(<span> )</span></span></div><div><span><span></span></span></div><div><span><span><img height="226" width="420" alt="" src="http://file.open.com.cn/ItemDB/88702/8899879a-b6bf-49e6-ac99-4269159bccdb/20111269119293.JPG" /></span></span></div>
A:错误
B:正确
<div align="left">图中电流<span>I=1.5A。（<span> </span>）</span></div><div align="left"><span></span><div align="left"><span></span></div><div align="left"><span></span></div></div><div align="left"><span><img style="WIDTH: 212px; HEIGHT: 151px" height="212" width="350" alt="" src="http://file.open.com.cn/ItemDB/88702/74900dc9-93a4-414e-8388-619a0714026b/2011125102335866.JPG" /></span></div>
A:错误
B:正确
<div> Y<sub>22</sub>等于双口网络输入端开路时的输出导纳。<span> (<span> )</span></span></div>N
A:错误
B:正确
<div align="left">图中<span> R</span><sub>1</sub>=6Ω, R<sub>2</sub>=4 Ω, R<sub>3</sub>=3 Ω, U<sub>S1</sub>=12V, U<sub>S2</sub>=24V。则电阻<span>R<sub>1</sub>消耗的电功率为24W。(<span> )</span></span></div><div align="left"><span><span></span></span></div><div align="left"><span><span><img height="177" width="344" alt="" src="http://file.open.com.cn/ItemDB/88702/736e08f0-0f8e-4743-ae0f-ff2f1c91a6cb/2011124154127130.JPG" /></span></span></div>
A:错误
B:正确
<div align="left">图中电流<span>I<sub>2</sub>=2A。(<span> )</span></span></div><div align="left"><span><span></span></span></div><div align="left"><span><span><img height="238" width="337" alt="" src="http://file.open.com.cn/ItemDB/88702/e5f1a4c9-d33a-4178-a89b-d3cadcbc1b0e/2011125101250779.JPG" /></span></span></div>
A:错误
B:正确
<div align="left">图中<span> R</span><sub>1</sub>=6Ω, R<sub>2</sub>=4 Ω, R<sub>3</sub>=3 Ω, U<sub>S1</sub>=12V, U<sub>S2</sub>=24V。则电流<span>I</span><sub>1 </sub>=2A.(<span> )</span></div><div align="left"><span></span></div><div align="left"><span><img style="WIDTH: 216px; HEIGHT: 135px" height="177" width="344" alt="" src="http://file.open.com.cn/ItemDB/88702/a7e24506-d0fa-4118-9c51-96843d0062a2/2011124153614308.JPG" /></span></div>
A:错误
B:正确
|
|
发表于 2020-8-8 19:00:53
