EEE U111 · Narrated walkthrough · Module 2 §2.4–2.5 · ladder step 3
Thevenin resistance with no battery: the test source
Why Voc ÷ Isc gives 0 ÷ 0 when a network has only a dependent source, and the fix: push 1 A in yourself and see what voltage it needs. Shown on a three-element network. Press play, keep the sound on, and answer the two questions it stops to ask you.
About two and a half minutes, watch once (use ⏮ ⏭ to replay a scene). The narration stops 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.
The same route in writing: Module 2 notes, dependent sources (example 5). Then see it check a real answer in the Norton walkthrough (Oct 2024 Q2).