EEE U111 · Narrated walkthrough · Module 3 basics §3.4–3.5
The starting slope: where dv/dt(0⁺) and di/dt(0⁺) come from
A short narrated lesson on a tiny series circuit with easy numbers. Why a second-order answer needs a second starting fact, and how to get the starting slope from the circuit with Kirchhoff’s laws and one division, no calculus. This is the step before the past-paper RLC questions. Press play, keep the sound on, and answer the two questions it stops to ask.
About three minutes, watch once (⏮ ⏭ replay a scene). It stops twice to ask for your next move. Commit to an answer before it continues. If “just before” and “just after” are new, watch the three snapshots first. The full transcript is below the player.
Redo it on paper without looking: freeze iL and vC, walk the 0⁺ loop, divide. Then the next step up: series RLC (Oct 2024 Q5b) and parallel RLC (Mar 2025 Q3). The written version is in the Module 3 lesson.