In parallel circuits, voltage is the reference phasor.

Admittance ($Y$) is the reciprocal of impedance ($Z$).

Complex algebra allows addition of complex currents representing magnitude and phase shift.

Vector method (Phasor diagram) provides a visual verification of current phase relationships.

Admittance method simplifies parallel branch arithmetic

Complex algebra handles phase angle summation efficiently

Phasor diagrams provide intuitive understanding of power factor

Vector method becomes tedious for circuits with more than 3 branches

Complex algebra requires proficiency in handling imaginary 'j' operator

Power distribution network analysis

AC motor winding calculations

Resonance frequency tuning circuits

Option A (Vector method) uses geometric summation of phasors.

Option B (Admittance method) is the most efficient algebraic way to handle parallel branches.

Option C (Complex algebra) is the mathematical foundation for both Admittance and Vector methods.