1. (a) Explain a balanced 3-phase circuit. If Vab=100V in a balanced Y- connected 3-phase generator, find the phase voltages for (a) abc and (b) acb sequence. (b) What is the phase sequence of a balanced three-phase circuit for which Van=120<30° and Vcn= 120<-90°. Find Vbn. (c) A three phase Y-connected source with phase voltage 120V is connected to a balanced delta connected load with impedance 19+j13O. Solve for the line currents and neutral current.

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Single Phase AC Circuit

Alternating Current (AC) is a type of electric power in which the electric current changes, both in magnitude and direction, at regular intervals. This AC Circuits can deliver power in either a Single Phase system or a Three Phase system.