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Download Electricity and Magnetism have a special relationship
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Generators: The Magnetism & Electricity Connection Amazing Discovery! In 1831, two scientists named Faraday and Henry were investigating the relationship between magnetism and electricity. They observed that when a magnet was moved back and forth inside a coil of wire, electrons started to flow through the coil. These scientists had made a very important discovery about the relationship between electricity and magnetism –magnets can be used to make, or generate, a flow of electrons! This discovery became known as “Faraday’s Principle”. Electricity & Magnetism: How it Works A magnetic field is the invisible area around a magnet where a magnet’s force can be felt. When a magnet moves, the magnetic field moves too. This movement of the magnetic field has an effect on the electrons inside the copper coil. The electrons in the copper coil start to flow, which produces electricity! Movement of the magnetic field causes electrons to flow in the copper coil. Move magnetic field Electrons start to flow in the copper coil Faraday’s Principle and Generators A generator is a machine that uses kinetic energy (movement) to make electricity using a magnetic field and a copper wire. Generators make it possible for homes and businesses to have electricity. One type of generator moves a powerful magnet through a coil of copper wire (like our shakelight). As long as there is some movement of the magnetic field, electrons will start flowing in the coil. This electricity in the coil can then be transferred wherever it is needed. How a Shakelight Works You have observed that in addition to the circuit and light bulb that all flashlights contain, shakelights also contain a magnet and coil of copper wire. Switch Copper Coil Magnet Light Bulb Rechargeable Battery Wire There is a mini-generator in a shakelight! The magnet and copper coil are used to generate a flow of electrons that can be stored in the shakelight’s rechargeable battery. The magnetic field moves back and forth inside the copper coil when you shake the shakelight. The movement of the magnetic field causes electrons in the coil to flow.