## S3 – Alternative Summary Notes

I’ve uploaded a set of summary notes that you might find useful as you prepare for the end of unit tests on Using Electricity. Download the pdf file using the link below.

Summary Notes

## S3 – making an electric motor

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

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!

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

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

## ring circuits

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

## series or parallel?

We’ve been looking at the different properties of series and parallel circuits over the past week or so.Â  Since there are only 91 days left until Christmas, I thought I would ask you all for some shopping advice.

I need a new set of Christmas tree lights.Â  Should I be in the market for a set of lights built in series or parallel?Â  Don’t forget to tell me what information influenced your choice!

If you’re not sure why the series/parallel decision would make a difference to tree lights, you might want to check this site.Â  There’s also some information on series and parallel circuits here.

## S3 Homework – AC/DC

Homework for 15 September is to complete the problems on page 7 of the homework booklets I gave out on Tuesday. We have recently reviewed AC & DC as part of the traffic lighting exercise, so you should be able to tackle these without too much difficulty.