When you spin a coil in a magnetic field, the flux through it constantly changes, inducing a voltage that reverses direction every half rotation. Transformers then use mutual induction between coils to change this AC voltage to whatever level you need, which is why power stations can send electricity hundreds of kilometres without massive energy loss. This is the real knowscape from knowhere, not a picture of one. Drag it. Watch what actually changes.
A motor and a generator are the same machine run in opposite directions: current-in makes turning, turning makes current. And the machine always fights itself — every motor generates a back emf, every generator resists being turned, because Lenz's Law is conservation of energy wearing work clothes.
The crowd sits flat and still — no motion, no signal moving through.
The loop starts turning and a wave rolls up, peaking as arms reach highest.
Turn steadily and the wave rolls on — up, down, over and over.
knowhere maps every concept to what it rests on and what rests on it — 1 underneath this one, 1 built on top. Each one says why, in a sentence, not as an arrow on a diagram.
Each one is its own knowscape in the app — built for how a particular student takes things in, not one explanation handed to everybody.
Every HSC and VCE concept in knowhere is built like this one — mapped to your curriculum, never capped by it. Free for a week. No card tricks, no lecture.
Free for a week, then $49 once — the 2026 exam pass ends itself after the last exam. 0 days of the pass left.
Free for a week, then a plan you can stop any time.
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