图10-5示电路中,供出功率的电源是()。https://assets.asklib.com/psource/2015110113322839992.jpg
图示电路中,电流I的值为 。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/6b38e52e73414a3aa87d4c2f935fe974.png
图示正弦交流电路中,已知,则其有功功率P等于( )W。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/297055eb4b854f78a5b6c9da31135f38.png
图示电路中,电流I3为( )。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/598ec8a1653b49a2a68f126dabffa852.jpg
图示电路中,电流I的值为 。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/6b38e52e73414a3aa87d4c2f935fe974.png
图示正弦交流电路中,已知,R=10Ω,XL=30Ω则u2=( )。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/91a390e26d5f4862865205c44298df30.png
图示环网中变压器的变比均为实际变比,对于环网中的循环功率,正确的说法是( )http://image.zhihuishu.com/zhs/onlineexam/ueditor/201809/aafa82044cac4ffd928524c5722bda00.png
功放电路如图所示,设输入为一个正弦信号,负载RL为8Ω,VCES=0,要求电路最大输出功率为10W,求电源电压的最小值()http://image.zhihuishu.com/zhs/onlineexam/ueditor/201809/cb4bfeefd48f4991813f159caf59d3e1.png
图示电路中,已知电路换路前已处于稳态,换路后uC(∞)为( )。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201902/22a8c47804b8445b9f6eef428d920a07.jpg
在图示电路中,U、I 的关系式正确的是http://image.zhihuishu.com/zhs/onlineexam/ueditor/201803/6381932f2ee041208b9053557ecf69ea.png
图示电路中,理想电压源发出的功率 P 为http://image.zhihuishu.com/zhs/onlineexam/ueditor/201803/c04b03f213394b0ca8c9f98372847980.png
在图示电路中,电源电压 U = 6 V。若使电阻 R 上的电压 U1 = 4 V,则电阻 R 为http://image.zhihuishu.com/zhs/onlineexam/ueditor/201803/71ec07bd8a404c2ba0c8df4246cb82cc.png
图示电路中A点电位VA为http://image.zhihuishu.com/zhs/onlineexam/ueditor/201803/0d56751fd15748d29f6150e525165170.png
在图示电路中,电压 UAB 为http://image.zhihuishu.com/zhs/onlineexam/ueditor/201803/be972729c1134ac88d58a9f9c0d1fecd.png
图示电路中的 U 为( )。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201812/af02655ce91d4fc6a1d9d6a5168edacc.png
图示电路中,电流源发出的功率为( )。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201904/03f3eba91390411681ab003e75ce1795.png
求图示电路中,各电源的功率为( )。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201904/1c8d0c04fcea4780a8ebc0032979aacf.png
图示电路为负载Y形联接的对称三相电路,已知电源线电压UL=380V,Z=(2+j3)Ω,ZL=2Ω,求负载的相电压UP和线电流Il。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/60557206ac7d4ab29db68c551aedc550.png
图示电路为负载Y形联接的对称三相电路,已知电源线电压UL=380V,Z=(2+j3)Ω,ZL=2Ω,求电源的总有功功率、无功功率、视在功率。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201811/60557206ac7d4ab29db68c551aedc550.png
求图示电路中4Ω电阻上的功率( )。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201904/80226da9730f4db78f7702f7dbcc3bea.png
图示电路中a、b端的等效电阻Rab为( )。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201904/f955af5091a74647b24800c4cbccb3cb.png
求图示电路中的电流i1和6Ω电阻上的功率( )http://image.zhihuishu.com/zhs/onlineexam/ueditor/201904/7465b7f375c9449fbbb74449bb66ea07.png
求图示电路中的电流i( )和16Ω电阻上的功率( )http://image.zhihuishu.com/zhs/onlineexam/ueditor/201904/bcac110e5be243df877f828be8d65150.png
在图示电路中,B点的电位VB为http://image.zhihuishu.com/zhs/onlineexam/ueditor/201803/0de1efa422f14410b078cf364c59cdc7.png