Some metals are capable of creating their own magnetic field, thanks to the unique orientation of their domain, the small magnetic field that are inherent in their crystalline structure. These metals, called ferromagnetic materials, include iron, nickel, certain alloys, and rare-earth metals. This doesn’t mean that other metals can no longer be made into magnets or at least part of a magnetic system.
By applying electricity, certain non-ferromagnetic metals can create a temporary magnetic field. This magnet, called electromagnet, consists of a coil and a core. The core is usually made of iron and the coil, of a highly conductive metal wire. Most electromagnets have copper coils, because copper is both electrically conductive and heat-resistant.
Electromagnets are extremely important because they can easily come in handy unlike permanent magnets that might not always be available. Additionally, you can conveniently increase the power of an electromagnet by simple increasing the current flowing in the system or increasing the size of the coil. The following are some of the applications where copper-coiled electromagnets are used. Read more from this article: http://bit.ly/2GDkY1N
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