An iron core makes a temporary electromagnet. It loses its magnetism as soon as the switch is opened and the current is switched off. A steel core makes a more permanent magnet. It does not lose ...

When the iron is used as the core in an electromagnet and a current is passed, the magnetic field it produces penetrates the iron’s bulk and forces the tiny fields to align along the external ...

The strength of its magnetic field depends on the electric current and the number of loops the wire makes around the core. It's possible to make an electromagnet without the iron core, but it won ...

The strength of the electromagnet can be increased by passing more electric current through the coils and/or wrapping more coils around the iron core. Electromagnets are used in devices such as ...

The current induced in the ring has an inductive phase shift relative to the induced EMF, and this phase-shifted current feels a Lorentz force from a radial magnetic field from the electromagnet's ...

Electromagnets usually consist of a coil of wire, often wrapped around a core made of ferromagnetic material like iron. When an electric current flows through the wire, it generates a magnetic ...

We’re still wrapping our heads around the whole ‘giant-headed figure’ fad, but we can look past the distorted proportions of this Iron Man Mark II because it’s the first Stark figure we ...