Electromagnetism Lecture Notes

These flashcards cover key concepts related to electromagnetism, focusing on types of magnets, materials, and principles of magnetism.

Permanent Magnet

A magnet that maintains its magnetic properties over time without requiring electricity.

Temporary Magnet

A magnet that only maintains its magnetic properties while in an electric field or circuit.

Ferrous Metal

A metal alloy that contains iron and has magnetic properties, e.g., carbon steel, alloy steel.

Non-Ferrous Metal

A metal that does not contain iron, which means it is not magnetic; examples include copper, aluminum, and gold.

Electromagnet

A type of magnet that uses electric current to produce a magnetic field and can be turned on and off.

Magnetisation

The process of making a magnetic substance into a magnet by rubbing it with a magnet or placing it in a strong magnetic field.

Magnetic Field

An invisible area around a magnet where the magnetic force can be felt; it cannot be seen.

Opposites Attract

The rule that states that north and south poles of magnets are attracted to each other while like poles repel.

Coil of Wire

A loop of wire through which electric current can flow, used in creating temporary magnets.

Maglev Train

A train that uses magnetic levitation to float above the tracks, dramatically reducing friction and allowing high speeds.