AC FUNDAMENTALS - PART - 07 - ALTERNATING CURRENT IN PARALLEL R-L, R-C AND R-L-C CIRCUIT

An ac parallel circuit consists of two or more branches in parallel. Each branch has either R or L or C. In parallel circuit voltage is constant, therefore potential difference across all the branches in parallel is the same. It is convenient to take voltage as the reference phasor in drawing the phasor diagram.

In parallel R-L-C circuit, if the inductive current is more than that of the capacitive current the circuit behaves as an inductive circuit. If the capacitive current is more than that of the inductive current then the circuit behaves as a capacitive circuit.

STEPS FOR SOLVING SERIES-PARALLEL CIRCUIT

1. Find the impedance in each branch.

2. Find the total impedance by combining the impedance in

    series and parallel circuit.

3. Find the total impedance in the circuit.

4. Find the branch currents.

5. Find the apparent power, active and reactive power and

    power factor.