1、2/7/202322/7/202332/7/202342/7/202352/7/202362/7/20237U IELSE+FU导线2/7/2023102/7/202312（一）电流+电流EEL2/7/202313Q 2/7/2023142/7/202315交流电的流向是正负交替的。交流电的流向是正负交替的。直流电的流向是恒定不变的。直流电的流向是恒定不变的。2/7/2023162/7/2023172/7/2023182/7/2023192/7/2023202/7/202321aOaO2/7/2023222/7/2023232/7/20232412VAB12VAB+-+-2/7/202325A
2、R1R2CIBE2/7/202326b5V8Va2/7/2023272/7/2023282/7/2023292/7/2023302/7/202331R2/7/2023322/7/2023332/7/2023342/7/2023352/7/2023362/7/202337+IRU一段无源支路2/7/2023392/7/2023412/7/2023422/7/202343外电路外电路EIr0UR+最简单的全电路内电路内电路U02/7/2023452/7/2023482/7/2023492/7/2023502/7/2023512/7/2023522/7/202354I1I2E1R1I3R2E2R3C
3、DABFG某电路某电路I1I2I3I4I5A2/7/202356如果电路中没有标注和，请在电路图中自己标注RI+-E1r01-+E2r02E1+E2=I r01+I R+I r02取顺时针方向逆时针I2/7/202359R1E1I2I1R2I3R3E2abcde电路绕行方向和电流流向如上：I1R1I2R2+I3R3=E1+E2ACER1E1R2E2R3BDFI1I3I22/7/202363E1R1R2E2E3R32/7/202364AR1E1E2R2R3R1R2R3I+U1UU2U3+_（一）串联电路I1I2I32/7/2023672/7/202368正确错误2/7/2023692/7/202
4、370UR1R2R3I1I2I3+_I2/7/2023722/7/202374EIE2总电动势EE=E1+E22/7/202375I=100ARX=?Ig=100mA2/7/202376g2/7/202378R3ABR1R2R4ABR1R3R24R124R3ABRABABabcd2/7/202379BR1R2R4R1R2R3UI1I2I3+2/7/202382ABR1R2R3R4UU2I1I2I32/7/2023832/7/2023852/7/2023862/7/2023872/7/2023882/7/2023892/7/2023902/7/2023912/7/2023942/7/202395谢谢大家！
