4. Circuit Analysis
NCEES Topic 4 (10–15 questions). Three-phase, symmetrical components, per-unit, phasor diagrams, single-phase, DC.
Chapters
Chapter
A. Three-phase circuits
Wye/delta, line vs phase quantities, power triangle, balanced + unbalanced loads.
Chapter
B. Symmetrical components
Positive/negative/zero sequence, sequence networks, unbalanced fault analysis foundation.
Chapter
C. Per-unit system
Base selection, per-unit conversion, per-unit transformers, power-system normalisation.
Chapter
D. Phasor diagrams
Phasor representation of AC quantities, voltage/current relationships in R, L, C.
Chapter
E. Single-phase circuits
Single-phase AC analysis, impedance, real/reactive/apparent power.
Chapter
F. Direct current circuits
Kirchhoff's laws, Thevenin/Norton equivalents, mesh + node analysis.