LEVEL II: ELECTROMAGNET PROJECTS

PROJECT # 1

To construct a device ( an electromagnet) that will create magnetic force using electricity.

MATERIALS NEEDED:

• magnet wire
• compass
• 1group of 6 disc magnets
• 1light bulb (christmas light bulb included in your kit)
• 3 plastic drinking straws (each cut to 2 1\2'' (6cm) )
• 1 small sheet metal piece (key)
• nail
• 2 3-volt battery holders (2 cells each)
• 1 block of wood
• sandpaper

PART 1: Magnetism from electricity

Two ways to show that when electrons move through a wire they produce a magnetic field that will cause the wire to be repelled or attract to another magnetic field

TRY THIS:

Before you start take the magnet wire and cut about 1 foot of wire, then you will have to remove the insulation from both ends of the wire. Now, take a screw and connect it in hole1, when the screw is half way in the wood take one end of the magnet wire and wrap it around the screw and then screw tight. Take your small sheel metal piece (when you attach it to the wood it will be called your key switch) and put a screw inside the hole and then connect it in hole 2. Take your battery holder and keep in mind that the battery holder has two wires, one red and one black. The red wire is the positive side of the battery and the black wire is the negative side of the battery. So, now that you know take the positive wire of the battery holder and connect it in hole 2 with the key switch, now screw tight. Take another screw and connect it in hole 4 before you screw tight, take the negative side of the battery holder and the other end of the magnet wire and connect them with the screw, now you can screw tigh. When you finish this move your wood to the edge of a table, so that the wire is hanging from the table. Under the magnet wire place a chair with your group of 6 disc magnets, in a way that the magnets are close to the wire but not touching (pic). If the wire is moving wait a few seconds untill the wire stop moving, then push down your key switch. What did it happen?Lets try to get the same results with something different. Remove the chair and the magnets. Take a compass and put it on top of your wood. Take your wire and place it on top of the compass, now press the key switch and observe the compass at the same time. What happen?