How do electromagnets work?

How Electromagnets Work

A magnetic field (usually denoted by B) is produced when there is a flow of moving electrons. When an electric current is run in a wire a Magnetic Force will be produced. F = I*l*B Force = Current * Length of wire * Magnetic Field.

You can create an electromagnet very easily. Get a steel or iron nail; wrap a copper wire around it as many times as you can. Then connect the ends to a positive and negative end of a battery. This will be an electromagnet.

A moving magnetic field going past a wire will induce in it a voltage (and produce a current if there is a circuit). This is how electric generators work. An electric current is produced by the change in Magnetic flux over time. Or just wave a common magnet in front of a conductor such as a wire, an electric current will be produced.

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