Find the current in each branch of the network using Kirchhoff’s law

Fig.23

A circuit receives 50 A current at a power factor of 0.8 lag from a 250, 50 Hz, 1-ph A.C. supply. Calculate the capacitance of the capacitor which is required to be connected across the circuit to make the power factor unity.

Explain

• Star – delta conversion
• Delta – star conversion with the help of a purely resistive circuit

Derive an expression for the resonant frequency of a parallel circuit, one branch consisting of a coil of inductance L and resistance R and the other branch of capacitance C.