How Can You Build a DC Electric Motor with Coils and a Magnet?

Click For Summary
To build a DC electric motor using coils and a magnet, start with a DC power source like a battery and gather materials such as wire, a magnet, and a sturdy base. Create coils by wrapping wire around a cylindrical object, ensuring enough wire is left for connections. Secure the coils to the base and connect them to the power source, using the left-hand rule to determine the magnetic field direction. Place the magnet between the coils to generate a magnetic field that will cause the coils to spin when the power is turned on. Experimenting with different coil sizes and power sources can enhance the motor's performance.
akademiks
Messages
7
Reaction score
0
hey, i have to create an electric motor using a DC source and using coils wrapped using the left hand rule (not bar magnets).
Anyone know an easy way to go about this?

i guess it has to be something like this. http://fly.hiwaay.net/~palmer/motor1.gif

it must be usable with a battery and a power generator...

Thanks for any help.
 
Last edited by a moderator:
Physics news on Phys.org


Creating an electric motor can be a fun and challenging project. The basic principle of a motor is to convert electrical energy into mechanical energy by using magnetic fields. To get started, you will need a DC power source, coils, and a few other materials. Here are some steps to guide you through the process:

1. Gather materials: As mentioned, you will need a DC power source, such as a battery, and coils. You can also use a power generator if you have access to one. Additionally, you will need a magnet, wire, and a base to hold all the components together.

2. Build the base: The base will serve as the foundation for your motor. You can use any sturdy material, such as wood or plastic, to build a platform with four supports to hold the components.

3. Create the coils: You will need to wrap the wire around a cylindrical object, such as a pencil, to create the coils. Make sure to leave enough wire on either end to connect to the power source.

4. Attach the coils to the base: Place the coils on the base, making sure they are evenly spaced. Use tape or glue to secure them in place.

5. Connect the coils to the power source: Use the left-hand rule to determine the direction of the magnetic field. Then, connect one end of the coil to the positive terminal of the power source and the other end to the negative terminal.

6. Add the magnet: Place the magnet between the coils, making sure it is close enough to create a strong magnetic field.

7. Test the motor: Turn on the power source and observe the movement of the coils. The magnetic field created by the magnet should cause the coils to spin, thus creating a motor.

Remember to experiment with different coil sizes and power sources to see how it affects the motor's speed and strength. Also, make sure to take safety precautions when working with electricity. Good luck with your project!
 
The book claims the answer is that all the magnitudes are the same because "the gravitational force on the penguin is the same". I'm having trouble understanding this. I thought the buoyant force was equal to the weight of the fluid displaced. Weight depends on mass which depends on density. Therefore, due to the differing densities the buoyant force will be different in each case? Is this incorrect?

Similar threads

  • · Replies 7 ·
Replies
7
Views
7K
  • · Replies 9 ·
Replies
9
Views
3K
  • · Replies 23 ·
Replies
23
Views
8K
  • · Replies 4 ·
Replies
4
Views
6K
Replies
0
Views
2K
  • · Replies 7 ·
Replies
7
Views
2K
  • · Replies 9 ·
Replies
9
Views
2K
Replies
13
Views
9K
  • · Replies 3 ·
Replies
3
Views
2K
Replies
8
Views
18K