Buzz
A magnetic generator illustrates how magnetism, combined with motion, can create electricity. Image credit: Bosca78 / Getty ImagesMain Takeaways
- A magnetic generator relies on the concept that movement and magnetism can produce electricity, providing a potential method for generating power in your home.
- To build a small-scale model, use materials like cardboard, a nail, some insulation tape, thin copper wire, and a small light bulb to showcase this concept.
- The construction process involves winding the copper wire around the nail, with a magnet's motion near the nail's tip generating the electricity needed to power the light bulb.
A magnetic generator showcases the concept that combining magnetism with movement can generate electricity [source: Weidner, Brown]. This simple yet effective principle is at the heart of the growing interest in using magnetic generators to power homes. We'll begin by constructing a small model that demonstrates the same concept behind the full-scale generator you may eventually build.
Required Materials
- A small piece of cardboard
- One nail, approximately 6 inches (15 cm) long
- Insulating tape
- 28 feet (8.5 meters) of thin insulated copper wire
- A small light bulb in its holder
Follow these steps:
- Cut out two circles from the cardboard, each about 1½ inches (3.8 cm) in diameter.
- Create a hole in the center of each circle.
- Insert a clean nail through the hole in one of the circles, and slide the circle up to the head of the nail.
- Wrap approximately 1½ inches (3.8 cm) of the nail with a layer of insulation tape.
- Place the second cardboard circle onto the nail, up to the end of the insulation tape, and secure it with more insulation tape.
- Wrap the copper wire between the two cardboard circles, over the insulation tape. Leave about 8 inches (20 cm) loose at the start. You'll need to wind the wire around at least 1000 times. Leave about 12 inches (30.5 cm) free after winding.
- Secure the wire spool with tape to prevent it from unwinding.
- Strip the insulation off both ends of the wire and connect them to the bulb holder.
- Place the magnet about ¼ inch (0.6 cm) from the nail's head and move it quickly from side to side [source: Hare]. The bulb will light up!
