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ME 123 — Electric Circuits

Buchanan · Spring 2026 · University of Waterloo

Charge, voltage, and power through op-amps — resistive networks, RC/RL transients, and AC phasor analysis, built final-exam-first for a cram sprint.

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1

DC Fundamentals

charge, current, voltage, power & energy, KVL/KCL, circuit elements, passive sign convention.

2

Resistive Network Analysis

series/parallel reduction, voltage/current dividers, node-voltage & mesh-current analysis, Thevenin/Norton, superposition, Wheatstone bridge.

3

Energy Storage & Transients

capacitance, inductance, first-order RC/RL transients, DC steady state, time constants.

4

AC / Phasor Analysis

AC current & voltage, phasors, complex impedance, AC circuit analysis, real/reactive/apparent power.

5

Operational Amplifiers

ideal op-amp properties, negative feedback, virtual ground, voltage follower, inverting amplifier.