2.RLC串联电路的阻抗 iR joL ++UR ++UR uc jC 由KVL: B-0.tv.tU-Ritjoi-i EIR+j(oL-=R+j(X,-X =(R+X) Z=号R+j-d=R+x=☑4g U2. RLC串联电路的阻抗 由KVL： . . . . . . . 1 j j I C U UR UL UC RI LI  = + + = +  − I R j X X I C R j L L C   )] [ ( )] 1 = [ + ( − = + −   R jX I  = ( + ) L C R u uL uC i + - + - + - + uR - Z z R jX C R j L j I U Z   = = +  − = + =  1   . I j L . U U L . U C . jωC 1 R + - + - + - + U R-