Unit: Electricity & Magnetism
A basic circuit (V, R, and a bulb) alongside the magnetic field that circles any current-carrying wire — the link between electricity and magnetism.
Why It Matters
Any wire carrying current creates a magnetic field around it, and any changing magnetic field can push current through a wire. That two-way relationship — electromagnetism — is the reason motors spin, generators make electricity, and your phone can charge without a cable.
How Electricity Works - for visual learners: A conceptual overview of voltage, current, and resistance using intuitive visual analogies.
Differences between generator and motor: A comparison of how mechanical energy is converted to electrical energy and vice-versa using electromagnetic induction.
How Motion becomes Electricity: Explores Faraday's Law and how moving a conductor through a magnetic field induces an electromotive force.
The Physics of Wireless Charging: Demonstrates resonant inductive coupling and how oscillating magnetic fields transfer energy across space.
LEDs as Fast As Possible: Explains electroluminescence and how semiconductor p-n junctions emit photons when forward-biased.
How does an MRI Scan Work?: Details the use of powerful magnetic fields and radiofrequency pulses to align and disrupt proton spins.
Why Thorium Is About to Change The World: Explores thorium molten-salt reactor design and how controlled nuclear fission generates electrical power more safely than conventional uranium reactors.
Sweden Brought Back DC Transmission: Explains why high-voltage direct current loses less energy than AC over long distances, prompting a return to Tesla's original transmission method.
Fusion reactors now work, but how close are they to rollout?: Examines magnetic confinement fusion and the engineering challenges of converting superheated plasma into usable electrical power.
Inside a Wind Turbine: How It Really Works: A breakdown of how blade aerodynamics spin a generator's rotor, converting the kinetic energy of wind into electricity through electromagnetic induction.
Electromagnetism Explained in Simple Words: A concise overview of how electric and magnetic fields are two expressions of the same underlying force.
Electric Guitar Explained In 2 Minutes (Animation): Demonstrates how a vibrating steel string disturbs a magnet's field to induce a tiny alternating current in a pickup coil.
How do Electric Transmission Lines Work?: Explains why power is stepped up to high voltage for transmission and stepped back down near homes to minimize resistive losses.
DON'T SUBSCRIBE | How does an Induction Motor work?: Details how a rotating magnetic field induces current in a rotor, producing torque with no direct electrical connection between stator and rotor.
Guitar Pickups Explained (Electronics for Musicians 101): A quick look at electromagnetic induction in single-coil and humbucker pickups and how their winds shape the output signal.