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A MagLab physicist and engineer pair up to demonstrate the lab's famous Quarter Shrinking Machine, a loud, stinky illustration of electrodynamics, circuits, Lenz’s Law and Lorenz forces. (Length: 7 minutes, 50 seconds)
Alternating current behaves differently, depending on what components are in a circuit.
A capacitor is similar to a battery in that both store electrical energy. But a capacitor can't actually produce new electrons; it only stores them.
Electric motors turn electricity into motion by exploiting electromagnetic induction.
In 1831, Michael Faraday carried out numerous experiments to prove that electricity could be generated from magnetism. He not only demonstrated electromagnetic induction, but also developed a good conception of the processes involved.
When a magnetic field is applied perpendicular to the flow of current, the field causes resistance in the current. This is the Lorentz force at work, and can be observed well in the Hall effect.
Ladies and gentlemen, start your engines and learn about the ignition coil, a type of step-up transformer key (no pun intended) to the operation of your car.
These devices, though quite humble, represented a tremendous breakthrough in the history of electricity; they were the first capacitors, and as such were able to store electric charge.
Learn the Lorentz force with the help of this tutorial, in which a wire fashioned into a pendulum moves inside a magnetic field.
This circuit is most commonly used to determine the value of an unknown resistance to an electrical current.