Page Current in AC Circuit  impressed volts Current impedance Force on conductors The force produced BIL Where B the flux density in teslas webers m I current L the total effective length of conductors Power Factor p.f true watts volts x amperes also p.f cos Φ where Φ is the angle of lag or lead Three Phase Alternators Star connected Line voltage x phase voltage Line current phase current Delta connected Line voltage phase voltage Line current x phase current Three phase power P E L I L cos Φ E L line voltage I L line current cos Φ power factor