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.