Magnetism and electricity are forces generated by the movement of electrons. They are both electromagnetic forces – the interplay of these two forces is the basis for many modern technologies.
Remember that there are some metals that have magnetic properties like: iron, steel, cobalt and nickel.
Electromagnets are magnets that are generated by electric fields. They have the advantage over regular magnets in that they can be switched on and off.
Electromagnets can be created by wrapping a wire around an iron nail and running current through the wire. The electric field in the wire coil creates a magnetic field around the nail or screw.
In some cases, the nail will remain magnetised even when removed from within the wire coil. Electromagnets are fundamental to many modern technologies.
Now, you can make your electromagnet at home!
Enjoy!
Here are some of the slides that explain this phenomenom:
Simon can you put more information for the exam pls.And get well soon😜😜
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