An electromagnet 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. The poles of an electromagnet can even be reversed by reversing the flow of electricity.
An electromagnet 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. The poles of an electromagnet can even be reversed by reversing the flow of electricity.
http://www.youtube.com/watch?v=l-RjuauyuzM
https://youtu.be/hajIIGHPeuU
https://youtu.be/tC6E9J925pY
https://youtu.be/tC6E9J925pY
Here are some links of electromagnetism videos, you can better understand from these videos... :-)