Learn how to build a simple, homemade electromagnet using a battery, copper wire, and a metal tool in this step-by-step guide for kids and science fairs.
An electromagnet is a type of magnet that creates a magnetic field by running an electric current through a wire. This is the same concept behind almost all electronic gadgets in use today. Imagine a world without televisions to keep us informed, radios to keep us relaxed, and computers to keep us busy. Truly, we have a lot to be grateful for.
Do you want to teach your child about electromagnets? Is there a science fair coming up? If so, why not help them make their very own electromagnet to show off to their friends at school? Read on to learn how.
- Prepare the materials. The materials you will need to make a homemade electromagnet are: a small screwdriver or any handheld metal tool, a meter of copper wire, screws or other small metal objects, a small wire stripper, and a 9-volt battery.
- Wrap the apparatus. To start making your electromagnet, take your screwdriver or chosen metal tool. Take your copper wire and leave about 5 inches of it free before you start wrapping the metal part. Continue coiling the copper wire around the metal part until it is entirely covered. Leave another 5 inches free at the other end.
- Strip the ends. Once done, take the ends of the wire and use a wire stripper to expose about an inch of bare wire beneath each end.
- Connect the ends. Once exposed, connect the wires to the battery, as the 9-volt battery will serve as the power source. You will notice two terminals on the battery. Take one end of the wire and connect it to the positive terminal, and the other to the negative terminal. Make sure you attach them properly and set the assembly aside for about an hour.
- While waiting. If you are doing this project with your child, this is the best time to explain how electromagnetism works. Using this experiment as an example, explain that connecting the wires wrapped around the screwdriver to the power source allows an electric current to flow through the wire, magnetizing the metal part of the screwdriver and creating a magnetic field. The one-hour wait helps strengthen the magnetic field and makes it last longer.
- Disconnect the wires. When the hour is up, disconnect the wires from the battery terminals. The screwdriver has now become an electromagnet. Test it by scattering screws or nails and trying to pick them up one by one. You can test it on other metal objects as well, such as safety pins and needles. Keep in mind, however, that the strength of the electromagnet will fade over time, but you can always recharge it.
- Recharging tips. Gather the copper wire you used for this project and store it safely until you need to recharge. Follow the same procedure, but use a fresh battery this time, as the previous power supply will be depleted.
And there you have it—a homemade electromagnet that your child can learn from and have fun with at the same time! Remember to always practice safety and under no circumstances use a powerful battery, such as an automobile battery, to prevent the risk of electrocution and fire.
How to Make a Homemade Electromagnet
Learn how to build a simple, homemade electromagnet using a battery, copper wire, and a metal tool in this step-by-step guide for kids and science fairs.
An electromagnet is a type of magnet that creates a magnetic field by running an electric current through a wire. This is the same concept behind almost all electronic gadgets in use today. Imagine a world without televisions to keep us informed, radios to keep us relaxed, and computers to keep us busy. Truly, we have a lot to be grateful for.
Do you want to teach your child about electromagnets? Is there a science fair coming up? If so, why not help them make their very own electromagnet to show off to their friends at school? Read on to learn how.
- Prepare the materials. The materials you will need to make a homemade electromagnet are: a small screwdriver or any handheld metal tool, a meter of copper wire, screws or other small metal objects, a small wire stripper, and a 9-volt battery.
- Wrap the apparatus. To start making your electromagnet, take your screwdriver or chosen metal tool. Take your copper wire and leave about 5 inches of it free before you start wrapping the metal part. Continue coiling the copper wire around the metal part until it is entirely covered. Leave another 5 inches free at the other end.
- Strip the ends. Once done, take the ends of the wire and use a wire stripper to expose about an inch of bare wire beneath each end.
- Connect the ends. Once exposed, connect the wires to the battery, as the 9-volt battery will serve as the power source. You will notice two terminals on the battery. Take one end of the wire and connect it to the positive terminal, and the other to the negative terminal. Make sure you attach them properly and set the assembly aside for about an hour.
- While waiting. If you are doing this project with your child, this is the best time to explain how electromagnetism works. Using this experiment as an example, explain that connecting the wires wrapped around the screwdriver to the power source allows an electric current to flow through the wire, magnetizing the metal part of the screwdriver and creating a magnetic field. The one-hour wait helps strengthen the magnetic field and makes it last longer.
- Disconnect the wires. When the hour is up, disconnect the wires from the battery terminals. The screwdriver has now become an electromagnet. Test it by scattering screws or nails and trying to pick them up one by one. You can test it on other metal objects as well, such as safety pins and needles. Keep in mind, however, that the strength of the electromagnet will fade over time, but you can always recharge it.
- Recharging tips. Gather the copper wire you used for this project and store it safely until you need to recharge. Follow the same procedure, but use a fresh battery this time, as the previous power supply will be depleted.
And there you have it—a homemade electromagnet that your child can learn from and have fun with at the same time! Remember to always practice safety and under no circumstances use a powerful battery, such as an automobile battery, to prevent the risk of electrocution and fire.
How to Make a Homemade Electromagnet
By Howtodotips
Learn how to build a simple, homemade electromagnet using a battery, copper wire, and a metal tool in this step-by-step guide for kids and science fairs.