Electromagnetism
Ohm’s Law Explained: V = IR
Three letters describe how voltage, current, and resistance dance together in nearly every circuit you will ever build.
Electromagnetism
Electromagnetism
Electric Charge and Coulomb’s Law Explained
From the crackle of static to the force binding atoms, one simple inverse-square law governs how charges attract and repel.
Waves & Optics
The Electromagnetic Spectrum
Radio waves, visible light, and gamma rays are all the same thing — only the wavelength changes across this vast,…
Electromagnetism
Magnetic Fields and Forces
Magnetism only acts on charges that move, and the force it delivers always pushes sideways — never speeding anything up.
Electromagnetism
Electric Field and Potential
One tells a charge which way to go, the other how much energy it carries — together they map the…
Electromagnetism
Electromagnetic Induction
Move a magnet near a coil and a voltage appears from nothing — this is the simple, profound trick behind…