140 ELECTRICAL ENGINEERING 



The impedance of the circuit is 



Z = fa + r 2 ) + j (x\ +' #2) 

 and its absolute value is 



Z = v fa + r 2 ) 2 + (#1 + # 2 ) 2 , 

 and the absolute value of the current is 

 E E 





the power factor of the circuit is 



The vector diagram is drawn taking the current as the axis. 

 (2) Solve the circuit in Fig. 106. 



.1. 



II 



FIG. 106. 



where 





the main current is 



1 = 1, +/, = 

 and its absolute value is 



+ 0*) - j (&i + 



The admittance of the circuit is 



^ = fei + ^2) - j (61 + 62) 



