Month: October 2006

I was going to show you all this youtube video on how to make your own electric motor home but the school was closed due to bad weather. I also found this diagram showing the parts of a dc motor.

Last week we looked at using electricity to get things moving. We looked at examples of an electric bell and the movement of a current-carrying bar of copper in a magnetic field. We’ll be taking an electric motor apart this week to see how it works but in the meantime, here is a link to an animation of an electric buzzer (same idea as the electric bell).

If you want to read someone else’s explanation of how an electric motor works, you could go here or here. There are animations of a dc electric motor here and here (this is the example I used in class).

We have almost completed the Using Electricity unit. We will start looking at magnetism tomorrow as an introduction to movement from electricity. The closer we get to the end of a unit, the nearer we are to test time.

You might want to download a copy of this electricity revision booklet to help you check how well you understand the topics we have covered. It also contains some useful revision questions in the homework section.

I found a decent image of a ring ciruit on wikipedia.  The page about ring circuits is not bad but those of you with a liking for diy might prefer the practical advice on ring circuits available from homebase.