National Examination — 16‑Elec‑A1 Circuits, December 2019. Closed‑book, 3 hours; any five of the six questions constitute a complete paper (all six are solved here). A short Laplace‑transform table and star–delta / maximum‑power formulae are supplied with the exam.
Reference texts. C. K. Alexander & M. N. O. Sadiku, Fundamentals of Electric Circuits, 7th ed. (McGraw‑Hill); W. H. Hayt, J. E. Kemmerly & S. M. Durbin, Engineering Circuit Analysis, 9th ed. (McGraw‑Hill). Methods: series/parallel & Δ–Y reduction, nodal analysis, first‑order and second‑order transients, AC phasor / Thévenin analysis, maximum‑power transfer, superposition, and the Laplace‑transform method.
Reconstructed figures. Each network below is redrawn element‑by‑element from the paper’s figures; every reference node, source polarity, switch state and current direction used in the solution is stated alongside it so a reader can reproduce every sign. Where a component placement could not be read with certainty it is flagged in a Check note — check those against your own copy of the paper.
