If you took introductory physics, you learned about the “fundamental forces.” It goes something like this: All interactions ...

When an electric current passes through a metal wire, a magnetic field forms around that wire (see diagram at right). Likewise, a wire passing through a magnetic field creates an electric current ...

How a Generator Works When an electric current flows through a wire, it generates a three-dimensional magnetic force field around the wire, similar to that surrounding a bar magnet. Magnets are ...

Over two centuries ago, physicist Michael Faraday described how electric current running through a coil of wire can create a magnetic field. This magnetic field can then induce an electric field ...

A fundamental goal of physics is to explain the broadest range of phenomena with the fewest underlying principles. Remarkably ...

To calculate the force on a wire carrying a current at right angles to a magnetic field, use the equation: 2 A flows through a 50 cm wire. Calculate the force acting on the wire when it is placed ...

Note that this magnetic field opposes the original change. For example, if a magnet is moved into a coil of wire, the induced magnetic field tends to repel the magnet back out of the coil.

How the universe got its large magnetic fields has remained ... like a copper wire 1,000 light-years across. Because the filtering of radiation through the interstellar gas wouldn't be perfectly ...

Researchers show that Cartan's First Structure Equation links crystal defects to the same mathematical rules governing ...

Getting a magnetic field to balance on another magnetic field ... with each winding getting about 800 turns of enameled wire. The rest of the circuit is straightforward. It appears he uses a ...