(c)画等效电路 ①U OC (d)求电流 Z Ⅰ=U0c 0 =1.13/820A 0 +Z ②用分流公式 3 求解 Z 2 Z12=Z1Z2 Z1 Is=1.13/82°A Z12+Z3+Z(c)画等效电路 + - UOC • Z0 Z • I (d)求电流 1.13/82 A Z Z U I o 0 OC = + = • • • I IS • Z1 Z2 Z3 Z ②用分流公式 求解 12 1 2 Z =Z // Z I 1.13/82 A Z Z Z Z I o S 1 2 3 1 2 = + + = • •