How To Make A Simple Motor
Which of the following will not be needed to make a simple motor?
Today, I'm going to show you how to make a simple motor. To make one of these, you will need some batteries to power the motor, you will need some very strong magnets as well, and you will need some very pure copper wire. Now, the store magnets, these are called neodymium magnets or rear earth magnets, and you can buy them on the Internet and they used to cost about a pound, pound fifty each, you need a couple of those, at least two or three. You will need a very pure copper wire. Now, I had tried this with various different grades of copper wire and what you have to do is you have to go to an electrical store and get some earth cable and you will see, that's quite pure copper wire, but you have to strip it down to get the copper wires out. You will need it to be thick enough that you can bend it and it stays in one shape. If the wire isn't pure enough, okay, you get some iron in the copper and that makes it magnetic, so instead of your motor spinning around, it will be attracted to the magnets and it will stop working, so that's why it has to be a pure copper wire. So I'm going to use my wire to make a shape that balances on this battery and can actually touch the top of the battery and the magnets as well. Luckily, the Science Museum has made a nice template for doing this sort of thing, so all you have to do is get your wire, make sure you bended it in the middle first so that it balances and then you just use this template, bend it all around the template like so. It's not easy to get exactly the same, but as long as it balances and is the same at the other side, that's fine. So, you bend it along that, bend it around like that and then like that, and then in kind a shape like that and then you have to bend two ends like so and like so, to make a connection with the battery and the magnet. You don't want those two bits to connect together and what you do is you balance it on top of the battery, like so, and then it moves around its center. And all that is happening is something called Fleming's left-hand rule, that if you get a current, this is Fleming's left-hand rule, it will use something like this. If you get a current going into the direction in your second finger and you get a magnetic field going in direction of your first finger, then you get a motion from those two fields interacting together, you get a force in direction of your thumb, so that's what is happening here. Current moving in one direction on the wire, magnetic fields coming out from around the magnets and it's forcing this thing around. And that's how motors work, and motors are that thing that makes a car possible and all sorts of electric devices possible, and before they were invented, everyone had to move around in horses and carts. So that's amazing invention - the motor, it's electromagnetism in action. That's how to make a simple motor. .
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