Lets continue with the previous EM Part 1 posted. As we already understand a very simple basic of electricity energy and current path, now it will lead us to magnetic part. As a conductor(previously green path) carrying a current flow through it will produce a magnetic field around it. A moving charge or electron will induce a magnetic field around it and vice versa. CLICK IMAGE TO ENLARGE
So that how magnetic field induced, as long as we have electron moving, there will be magnetic field induced around it path. So what can be used with magnetic field? Even kids know that magnet have abilities creating a push-pull forces depend on the poles orientation. We have north-south pole for magnet, ask you little-brother to solve it for you.
We are using this forces to create torque for electrical motor. To talk about how we can design an electric motor really take a lot of effort as we need to think and design carefully(base on my own experience building homemade dc motor) to manipulate this forces. Here a link for my friend dc motor project.
If you want more detail, you can read about Lorentz force. This part required a basic vector analysis and lots of equation. I will not go deep about this, it is a waste if we will not cover the basic very well. This article only for simple knowledge sharing. Enjoy Part 3 in progress.
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