Question

List two methods of producing magnetic fields.

Answer 1

Two methods of producing magnetic fields are:

1. Electric Current: When an electric current flows through a conductor, it generates a magnetic field around it. This is the principle behind electromagnets, where a coil of wire wrapped around a core (often made of iron) produces a magnetic field when an electric current passes through the coil.
2. Permanent Magnets: These are materials that naturally possess their own persistent magnetic fields. They can be made from certain materials like iron, nickel, cobalt, and some rare earth metals. These materials have aligned magnetic domains that create a permanent magnetic field without the need for an external power source.