A coil of wire, or solenoid, consists of a wire coiled up into a spiral shape. When an electric current flows, the shape of the magnetic field is very similar to the field of a bar magnet. The ...

The principle states that when a magnetic field source, such as a conducting wire coil, induces a field in a second source, the second will be able to induce a field in the first. Therefore, a ...

The wire with 10,000 volts is wrapped into a large (primary) coil with only a handful of turns. The secondary coil contains thousands of turns of thin wire. This steps up the voltage to between ...

This creates a magnetic field in the coil and the coin. These two fields repel each other, and there’s only one way that it can end: the coin shrinks and the coil of wire explodes.

Similarly, if a magnetic field flows through the center of a coiled wire, a voltage is generated in the wire, which causes an electrical current to flow. The electric potential (“hill”) generated in a ...

Wireless electric vehicle (EV) charging is a breakthrough in charging technology that eliminates the need for physical cables ...

If you made a motor out of a magnet, a wire coil, and some needles, you probably remember that motors and generators depend on a rotating magnetic field. Once you know how it works, the concept is … ...

Let's start with a very simple demonstration. Here I have a coil of wire connected to a Galvanometer. I could write a whole post on just the Galvanometer, but for now I will just say that it ...

The magnetic field around a single, straight piece of wire is fairly weak. Wrapping a bunch of wire into a tight coil, however, can make the magnetic field much stronger.

On June 22, 2011, scientists at Helmholtz-Zentrum Dresden-Rossendorf set a new world record for magnetic fields with 91.4 teslas. To reach this record, the researchers developed a coil weighing ...

A changing magnetic field induces a current in a conducting wire. Yes, that's cool - but it's also important. This physics principle behind many of the electric generators (but not all).

I had cause to demonstrate the magnetic field around a wire, and ended up with an 8A current in a vertical wire, battling with the Earth’s magnetic field. My borrowed idea was to put a ring of eight ...