22-Mec-A5 Electrical and Electronics Engineering, May 2013: worked solutions

Paper format. PEO/EGBC National Examinations, May 2013 — 07-Mec-A5 Electrical & Electronics Engineering (Mechanical Engineering). Three hours, closed book, two approved calculators (Casio or Sharp). Eight questions of equal value; any five constitute a complete paper, and only the first five appearing in the answer book are marked. Constants supplied on the front page: $\pi = 3.14159$, $1\ \text{hp} = 746\ \text{W}$, $\mu_0 = 4\pi\times10^{-7}\ \text{H}\,\text{m}^{-1}$. All eight questions are solved here so the solutions cover whichever five a candidate chooses.

Reference texts

Sedra & Smith, Microelectronic Circuits, 8th ed. — BJT current mirrors (Ch. 8), op-amp circuits (Ch. 2).
Mano & Ciletti, Digital Design, 6th ed. — Boolean algebra and DeMorgan’s theorems (Ch. 2), NAND/NOR universal gates (Ch. 3).
Chapman, Electric Machinery Fundamentals, 5th ed. — dc machine emf and torque (Ch. 7–8), induction motors and the dc test (Ch. 6), transformers (Ch. 2).
Sadiku & Alexander, Fundamentals of Electric Circuits, 7th ed. — ac power and power-factor correction (Ch. 11), first-order transients (Ch. 7), frequency response (Ch. 14).
Hayt, Kemmerly & Durbin, Engineering Circuit Analysis, 9th ed. — phasor methods and transfer functions.

22-Mec-A5 Electrical and Electronics Engineering: May 2013