Electromagnetic Induction

🧠 Remember it

Electromagnetic Induction

Move a magnet near a coil → a current is induced. "Change the magnetic field, get a current." Faster movement, a stronger magnet or more turns = a bigger current (Faraday's law).

🌏 In real life

A bicycle dynamo lights your lamp as you pedal: the spinning magnet inside induces a current in the coil — no battery needed, just motion.

📝 Quick notes

• Electromagnetic induction is producing a current by changing the magnetic field through a coil.
• It was discovered by Michael Faraday.
• A current is induced ONLY when the magnetic field through the coil is changing (moving magnet or coil).
• A faster change, more coil turns and a stronger magnet all increase the induced current.

🎯 Test yourself

What must happen for a current to be induced in a coil?

The magnetic field passing through the coil must change — for example, a magnet moving in or out.

Learn it fully — free

See the animated, step-by-step Electromagnetic Induction lesson on Syllab

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