This is how an electromagnet works. Wrap wire around a nail, run current through it → nail becomes magnetic. Turn off current → magnetism vanishes. This is why scrap yards can drop cars.
Since this is a text guide, you can create your own "Updated PDF" right now:
Old PDF: "Induction only works over millimeters." Updated PDF: "With resonant coupling, we can now charge a drone while it flies or a phone 2 inches away. Your new iPhone and Android use magnetic resonance, not just induction." electromagnetism for dummies pdf updated
Those big cylinders you see on telephone poles are transformers.
James Clerk Maxwell unified these concepts into four famous equations. You don't need to do the math, but understanding what they mean is the key to modern physics. This is how an electromagnet works
Electromagnetism is one of nature’s four fundamental forces. Without it: no light, no electricity, no magnets on your fridge, no smartphones, no internet. It’s the reason you can read this text on a screen.
Title: Electromagnetism for Dummies (Updated PDF Edition) Target Audience: STEM Students, Hobbyists, and Physics-phobes Verdict: The gold standard for bridging the gap between pop-sci analogies and actual university physics. Old PDF: "Motors are simple
Old PDF: "Motors are simple." Updated PDF: "Permanent magnet synchronous motors (PMSM) in a Tesla use neodymium magnets so strong they can crush a finger. Regenerative braking is just a motor running backwards as a generator."