电路分析试卷4(附答案)

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1、学院、系专业班级学号姓名······························密································封·······························线···································学院学年第学期《》期末考试试卷年级专业（本试卷考试时间120分钟满分100分）题号一二三总分复核得分得分阅卷人一、填空题(每题3分，共30分)1.当取非关联参考方向时，理想电感元件的电压与电流的相量关系式为。2.RLC串联谐振电路的谐振

2、频率w=。3.在使用叠加定理适应注意：不作用的电压源用代替，不作用的电流源用代替,不能单独作用。4.若电路的导纳Y=6+j8，则阻抗Z=R+jX中的电阻分量R=，电抗分量X=。5.额定值为220V、40W的灯泡，接在110V的电源上，其输出功率为W。6.已知负载阻抗为，则该负载性质为。7.一般情况下，电感的不能跃变，电容的不能跃变。8.RC串联电路的零状态响应是指uc(0-)零、外加激励零时的响应。（t=0时换路）（填写等于或者不等于）9.正弦电压为u1=－10cos(100πt+3π/4),u2=10cos(100

3、πt+π/4),则u1的相量为，u1＋u2=。10.在一阶RC电路中，若C不变，R越大，则换路后过渡过程越。第5页，共4页学院、系专业班级学号姓名······························密································封·······························线···································得分阅卷人二、单项选择题(每小题3分，共30分)1.变压器的基本作用是（）。A.变电压B.变电流C.变阻抗D.变相

4、位2.照明灯的开关一定要接在（）线上。Ａ.中　Ｂ.地　Ｃ.火Ｄ.零3.在ＲＣ并联的正弦电路中，如果电阻中电流为５Ａ，总电流为１３Ａ，那么电容中电流为（）。Ａ.８Ａ　Ｂ.１２Ａ　Ｃ.１８Ａ　Ｄ.１４Ａ4.在R、L、C串联电路中，当总电流与总电压同相时，下列关系式正确的是（）A.ωL2c=1B.ωLC=1C.ω2LC=1D.ωLC2=15.图示电路中电压等于（）A.4VB.-4VC.6VD.-6V6.图示电路中负载电阻吸收的最大功率等于（）A.0WB.6WC.3WD.12W7.图示电路开关闭合后的电压等于（）A.2VB.

5、4VC.6VD.8V第5页，共4页学院、系专业班级学号姓名······························密································封·······························线···································8.图示正弦电流电路中电压的振幅等于（）A.0.1VB.0.4VC.0.3VD.0.2V9.图示单口网络相量模型的等效导纳等于（）A.(0.5+j0.5)SB.(1+j1)SC.(1-j1)SD.(0.

6、5-j0.5)S10.10电阻和0.2F电容并联电路的时间常数为()A.1SB.0.5SC.2SD.3S得分阅卷人三、计算题（每小题10分，共40分）1.图示正弦电流电路中，已知V，求电流和。第5页，共4页学院、系专业班级学号姓名······························密································封·······························线···································2.计算图示电路的电压和3.图

7、示电路中电流求稳态电流。4.计算图示电路中的电流和电压。第5页，共4页学院、系专业班级学号姓名······························密································封·······························线···································电路分析试卷四答案一、填空题(每题3分，共30分)1.2.3.短路，短路，受控源4.0.06，-0.085.106.感性7.电流，电压8.等于，不等于9.10.长二、

8、单项选择题(每小题3分，共30分)12345678910ACBCBCDDDC三、计算题（每小题10分，共40分）1.2.由叠加定理求得。3.4.第5页，共4页