All coursesCourse
Electromagnetism
Charges, circuits and fields — the physics that powers everything you plug in.
8 lessons~3hno sign-up
Charges, circuits and fields — the physics that powers everything you plug in.
8 lessons~3hno sign-up
Why rubbing a comb on hair makes it attract paper.
The invisible force field around charges — visualised with field lines.
V = IR — and why your charger gets warm.
Why one failed bulb kills the whole string — or doesn't.
How a current-carrying wire pushes a magnet across a table.
Move a magnet through a coil — electricity appears from motion.
Two plates, a gap, and stored energy — how flash cameras and defibrillators work.
Nature resists change — the induced current always opposes what caused it.