The magnetic field due to a long straight wire would be: The μ~0 over 4π is just a constant. r is the distance from the center of the wire.

Since the compass is underneath the wire, the magnetic field due to the wire will be 90° to the Earth's magnetic field. Photo: ... it won't move in a straight line along the direction of the current.

Faraday’s Law of Induction describes how an electric current produces a magnetic field and, conversely, how a changing magnetic field generates an electric current in a conductor.

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 ...

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.

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 ...

Dot Physics. Physics Problem; Magnetic Force on a Loop due to a Long Straight Wire. Posted: May 28, 2025 | Last updated: May 28, 2025. Physics and Python stuff.

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 ...

Why does Earth have a magnetic field? Earth's main magnetic field is generated in the planet's outer core, a layer of molten iron 2,2001,800-3,100 miles (2,890-5,000 kilometers) below the planet's ...