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04-BS-4: December 2015

Nivaar worked solution (AI-drafted; not reviewed by a licensed engineer)

  1. Question 1 DC Circuit — KCL, KVL, and Branch Quantities
  2. Question 2 Thévenin Equivalent and Maximum Power Transfer
  3. Question 3 First-Order RL Transient
  4. Question 4 AC Steady-State Phasor Analysis
  5. Question 5 Magnetic Circuit — Reluctance and Air-Gap Flux
  6. Question 6 Full-Wave Center-Tapped Rectifier and RC Filter Design
  7. Question 7 Combinational Logic Design — HVAC Controller

Start with Question 1 →

National Exams December 2015 — 04-BS-4 Electric Circuits and Power, 3 hours, closed book (one aid sheet permitted, Casio/Sharp approved calculators). The paper instructs "any five questions constitute a complete paper" and marks only the first five answered; every question is solved so the set stands as a complete study resource.

Reference texts: Sadiku, Fundamentals of Electric Circuits (6th ed.) — DC/AC circuit analysis, Thevenin/Norton, first-order transients, phasors, magnetic circuits, diode rectifiers; Mano & Ciletti, Digital Design — combinational logic design (Question 7).

Check: several figure dimensions/polarities in this paper are read directly from the printed figure (vision-caption topology is a known failure mode on this subject); the specific reads are flagged inline where they affect a result (Q2 Thevenin distractor branch, Q5 mean magnetic path lengths, Q7 "desired temperature reached" logic).