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 ...

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 ...

We also talked about the force from a magnetic field on a current running through a wire, and on a single charge moving through a magnetic field. And we went through the three right-hand rules.

Vector Nature: Magnetic fields have both magnitude and direction. ... When an electric current flows through the wire, it generates a magnetic field concentrically surrounding the wire.

The cyan arrows represent the magnetic fields from the two rails. The red arrows are electric current and the gray arrow is the force vector on the moveable wire crossing the two rails.

Just to be clear, B is the vector value of the magnetic field at the location of the small piece of wire. The small section of wire has a length dl and the current ( I ) is in the direction of ...

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 … ...

How the universe got its large magnetic fields has remained one of the ... electrically charged dust grains would create a weak-but-wide-scale electrical current, like a copper wire 1,000 ...

How the universe got its large magnetic fields has remained one of the ... electrically charged dust grains would create a weak-but-wide-scale electrical current, like a copper wire 1,000 ...