Electromagnetism — three ways to learn it.

The complete written lesson — the magnetic field and field lines, force on a current-carrying conductor F = BIL, force on a moving charge F = qvB, the field of a long wire and a solenoid, torque on a current loop τ = NBIA, and how the galvanometer, the DC motor and the moving-coil speaker work.

As you scroll, a live 3D panel animates every idea: switch on the current and watch the field curl around the wire, then place a conductor in the field and see Fleming's left-hand rule kick it sideways — the laws of electromagnetism, alive on screen.

Run the force-on-a-conductor experiment on a safe, virtual bench: vary the current through the wire and measure how the magnetic force F grows in step with I, then plot the straight-line F vs I graph.