EEE U111 · Narrated walkthrough · Module 3 §3.2–3.3
A capacitor after a switch, from basics to Oct 2024 Q3(b)
A narrated lesson that starts from what a capacitor does, builds the two facts every switching question rests on, and then solves the 9-mark past-paper question end to end: v(0⁻), v(0⁺), v(∞), τ, the formula, and the two numbers. Press play, keep the sound on, and answer the four questions it stops to ask you.
About seven minutes, watch once (use ⏮ ⏭ to replay a scene). The narration stops four times to ask what the next move is. Commit to an answer before it continues: those pauses are the point, because they practise starting a question, not following one. Captions are on by default; the full transcript is below the player.
Close the page and redo Q3(b) on paper, then try Q3(a) of the same paper (the inductor version: L is a short in steady state, τ = L/R). The written method and more worked examples are in the Module 3 lesson and notes; the full paper is on the mid-sem past papers page.