01
Current, resistance and DC circuits
What is actually flowing, and what is actually doing the pushing?
InteractiveFree
Circuit Simulator ↗Paul Falstad
Build a circuit and watch the charge move. Unbeatable for intuition.
Classical · Module 07
Electricity & Magnetism II — Maxwell's Synthesis
The single most beautiful moment in classical physics. Four laws, one added term, and light falls out of equations that were never about light.
By the end of this module
You can derive the existence and speed of light from four equations about charges and magnets.
0%0 / 6 complete
02
Magnetic fields and forces
Why is magnetism just electricity seen from a moving frame?
VideoFree
How Special Relativity Makes Magnets Work ↗Veritasium
The length-contraction derivation that makes magnetism stop feeling arbitrary.
03
Ampère's law and Faraday induction
Why does only *change* in a field produce a current?
04
Maxwell's equations assembled
What breaks if I leave out the displacement current?
Primary source★ LandmarkFree
A Dynamical Theory of the Electromagnetic Field ↗James Clerk Maxwell, 1865
The original. Section on the electromagnetic theory of light is the payoff.
05
Electromagnetic waves — and light
Where does c come from, if I never measured light?
Check yourself
End-of-module quiz
Every answer comes with the reasoning, not just a verdict. Getting one wrong and reading why is the point.
01Maxwell's added displacement-current term was required to:
02The speed of light emerges from Maxwell's equations as:
03A loop of wire sits in a uniform, constant magnetic field. The induced EMF is:
Answer all 3 to finish the module.