2.R、L、C元件的阻抗和导纳 (1) R: UR=RI R ZR=R,YR=R=G (2)L: UL=jOLIL ZL=j0,Y=,,=-j jOL (3)C: Ic=iaCUc =J0 oC joC DOWNUP DOWN 2. R、L、C 元件的阻抗和导纳 （1）R： U R R I R • • = （2）L： L j j L ZL j L YL  = −  =  = 1 1 , （3）C： Y j C C j C Z j C C =   =  = − , 1 1 G R ZR = R , YR = 1 = U L j L I L • • =  I C j C UC • • = 