电路如图7-25所示，已知R=1kΩ，C=2μF，电路对f=500Hz的信号发生谐振，谐振时端口电流为0.1A，电流表的读数最接近于（）A。https://assets.asklib.com/psource/201511011116373695.jpg

A . 10 B . 3.3 C . 1 D . 3.63

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 . a比b高，7mA B . a比b高，2mA C . a比b低，7mA D . a比b低，2mA

A . 4 B . 6.8 C . 8 D . 9

A . 0A B . 0.1A C . -0.1A D . 100A

A . 40 B . 12 C . 21 D . 62

A . －50 B . 0 C . 10 D . 50

<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/2020-10-07/970928095949995.png' />

试写出题图12-4(a)、(b)所示双口网络的转移电流比，并用计算机程序画出电阻R=1kΩ和电容C=1μF时电路的幅频特性曲线。 <img src='https://img2.soutiyun.com/ask/2020-07-07/962979932609709.png' /><img src='https://img2.soutiyun.com/ask/2020-07-07/962979942033248.png' /><img src='https://img2.soutiyun.com/ask/2020-07-07/962979947940586.png' /><img src='https://img2.soutiyun.com/ask/2020-07-07/962979953660913.png' /><img src='https://img2.soutiyun.com/ask/2020-07-07/962979959421242.png' />

在图5.12[教材图5.4.9(a)]所示积分电路中,已知R=100kΩ，C=0.1μF,在t=0时加人u1= -20 mV(直流),集成运放的额定输出电压为13V。试求加入u1后2s时的uo值。 <img src='https://img2.soutiyun.com/ask/2020-07-13/963478636081334.png' />

<img src='https://img2.soutiyun.com/ask/2020-08-25/967199588716077.png' />

电路如图题11.1.3所示，已知V₂=20V，R_L=50千欧，C=1000μ_F。(1)如当电路中电容C开路或短路时，电路会产生什么后果？两种情况下V_L各等于多少？(2)当输出电V_L=28V，18V，24V和9V时，试分析诸情况下，哪些属于正常工作的输出电压，哪些属于故障情况，并指出故障原因。 <img src='https://img2.soutiyun.com/ask/2020-12-04/975948536131091.png' />

电路如题图5-8所示，已知R₁=10Ω，C=10³μF，R₂=0.5Ω，ω=1000rad/s，<img src='https://img2.soutiyun.com/ask/2021-01-03/978529389968761.png' />求当电流有效值I最大时，电感L为何值？ <img src='https://img2.soutiyun.com/ask/2021-01-03/978529403802552.png' />

电路如图所示，已知R=50Ω，L=2.5mH，C=5μF．电源电压U=10V，角频率ω=10⁴rad/s，求电流<img src='https://img2.soutiyun.com/latex/latex.action' />、<img src='https://img2.soutiyun.com/ask/uploadfile/5499001-5502000/d1af2cd2ab3ec9264f1b32c97996ae01.png' /><img src='https://img2.soutiyun.com/ask/uploadfile/5499001-5502000/7953321cf378e46b1e9d47bfb6637091.png' />和<img src='https://img2.soutiyun.com/ask/uploadfile/5499001-5502000/20b08680be5b4effb9d6d2076513acdc.png' />，并画出其相量图。 <img src='https://img2.soutiyun.com/ask/uploadfile/5499001-5502000/bbdcd7c3cadc288f80e41810febcd2b9.png' />

在图6.7(教材图 6.2.1)所示的多谐振荡器电路中，已知R=R1=1kΩ,R2=2kΩ,C=0.1μF,试求输出波形的周期T和频率f0。 <img src='https://img2.soutiyun.com/ask/2020-07-13/963479927508199.png' />

题7-27图所示电路中，已知i_S=10e(t)A，R₁=1Ω，R₂=2Ω，C=1μF，u_C(0-)=2V，g=0.25s。求全响应i₁(t)、i_C(t)、u_C(t)。 <img src='https://img2.soutiyun.com/ask/2020-09-02/967900598791111.png' />

<img src='https://img2.soutiyun.com/ask/2020-11-14/974195543360225.png' />

<img src='https://img2.soutiyun.com/ask/2020-10-07/970927289819887.png' />

<img src='https://img2.soutiyun.com/ask/2021-02-02/981108857928113.png' />

<img src='https://img2.soutiyun.com/ask/2021-02-24/983013093267384.png' />

<img src='https://img2.soutiyun.com/ask/2020-07-08/963050295433686.png' />