GEOLOGY

Detailed explanation-1: -The Electromagnet. If we concentrate the magnetism created by a current carrying wire by wrapping it in a tight coil around an iron core (here a nail), we get an electromagnet: a magnet we can turn on and off!

Detailed explanation-2: -electromagnet: A magnet made of an insulated wire coiled around an iron core (or any magnetic material such as iron, steel, nickel, cobalt) with electric current flowing through it to produce magnetism.

Detailed explanation-3: -Electromagnets can be created by wrapping a wire around an iron nail and running current through the wire. The electric field in the wire coil creates a magnetic field around the nail.

Detailed explanation-4: -Moving charges create magnetic fields, so when the coils of wire in an electromagnet have an electric current passing through them, the coils behave like a magnet.

Detailed explanation-5: -You can make an electromagnet by having a core of magnetic material (such as iron) surrounded by a coil of wire through which an electric current is passed to magnetise the core.