Prime objective of this lecture is to present on What is an Electromagnet? Electromagnet is a magnet made from a current bearing coil of wire wrapped around an iron or steel core. Since electricity can be turned on and off, so can an electromagnet. It can even be weakened or strengthened by decreasing or increasing the current. It is a magnet that runs on electricity. Unlike a permanent magnet, the strength of an electromagnet can easily be changed by changing the amount of electric current that flows through it.