Friday, 22 November 2013

How To Make An Electromagnet

How To Make An Electromagnet 

Magnets are one of the most fun things to experiment with. With a few materials you can easily make your own electromagnet.




List of Materials

(Optional Materials)

The wire produces a weak magnet field when current flows through it.

By coiling the magnet wire we concentrate the magnetic field
Coiled enamelled copper wire makes a weak magnet

Coil the Wire

Simply running current through a wire produces a weak magnetic field. But this is usually too weak to give us visable results. By coiling the wire closely we amplify the magnetic influence which gives us visable results. The closer these windings are the better the electromagnet will be.

By winding the enamelled copper wire around an iron nail we make a more powerful magnet
Now the electromagnet has an iron core it is stronger.

Make the Magnet Stronger


To make our electromagnet stronger we can give it an iron core. This will boost the power of our electromagnet and give us better results. This is as simple as winding the copper enamelled wire around an iron nail and securing it with sticky tape. When you connect it to a battery you will a have a stronger electromagnet. There are some simple things we can do to make our electromagnets stronger.

To make electromagnets stronger we must do the following:

  • Add more windings
  • Give it an iron core
  • Increase the current flowing through the wire 

Make your own iron filings with an iron nail and a file.
Be careful with batteries around iron filings.

Make Your Own Iron Filing 


You can make your own iron filings by filing down a spare iron nail. Don’t forget to put a piece of paper down to catch the filings as they drop and help you see them.

One piece of safety advice, don’t leave your battery in a position where it or the leads attached to it could come into contact with the iron filings. As they are very small, if electricity runs through them they will get super hot and burn.
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