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moon jigsaw October 31, 2006

Posted by mrmackenzie in : Space Physics , add a comment

I forgot to say that the moonsaic project starts tomorrow. Get yourself a smart poster for your bedroom wall - and it’s free!

S3 - making an electric motor October 31, 2006

Posted by mrmackenzie in : Using Electricity , add a comment

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.

S3 - movement from electricity October 30, 2006

Posted by mrmackenzie in : Using Electricity , 1 comment so far

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).

almost there! October 3, 2006

Posted by mrmackenzie in : Using Electricity , add a comment

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.

last chance to hand in homework October 3, 2006

Posted by mrmackenzie in : events , add a comment
03/10/06
2:10 pm

I won’t mark any homework on useful circuits handed in after today.

ring circuits October 1, 2006

Posted by mrmackenzie in : Using Electricity , add a comment

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.