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Physical changes versus chemical changes. A key concept in Faraday’s lectures is the distinc-tion between a physical and a chemical change. You can introduce students to a physical change by studying a sugar-water solution, and then to a chemical change with the electrolysis of water.
Video summary. Dick and Dom from 'Absolute Genius' describe the life and scientific work of Michael Faraday. He lived about 200 years ago and is most remembered for his work on electrical...
Although he had little formal education, he revealed the unitary nature of all types of electricity and discovered electromagnetic rotation—by which electric current and a magnetic field interact to rotate a metal object—and electromagnetic induction, which is elaborated upon in the passage below.
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Electromagnets and Electromagnetic Fields
1. In the What Factors Affect the Strength of an Electromagnet? lesson, students make simple electromagnets each using a battery, wire, and a nail (a classic experiment!), and then explore how different variables may affect the strength of an electromagnet. For example, using a ferromagnetic core may result in a stronger electromagnetic field. As they experiment to see how many paper clips their electromagnet can pick up, they can easily see and assess the impact of changing different variabl...
Electric Motors
1. In the How to Make a Homopolar Motor activity, students make a simple homopolar motor using a battery, a magnet, and a piece of wire. This creates a closed circuit when the wire touches both the battery and the magnet (that is touching the bottom of the battery). The electrical current that flows through the wire interacts with the magnet's magnetic field, resulting in a force that pushes on the wire and causes it to spin around the battery. This force is called the Lorentz force. The spin...
Electric Generators
An electric generator reverses the process used by an electric motor and converts mechanical energy into electrical energy. (A motor converts electrical energy into mechanical energy.) These experiments involve making and testing an electric generator. 1. In the Human-Powered Energy project, students build a small generator that is "human-powered," meaning the generator creates electricity when you shake it. This kind of alternative energy is sustainable and is used, for example, in some flas...
Exploring electromagnetism with students often centers around building and testing simple electromagnets, simple electric motors, and electric generators. These explorations involve both permanent and temporary magnets and help students see how magnetic fields can be used to create electric current. Electric motors use a magnet's ability to attract...
The Electricity, Magnetism, & Electromagnetism Tutorial resource is a good place to start when introducing electromagnetism to students. For older students, the resource can be a helpful refresher. The video above offers an overview of magnets and electromagnets. (Tip!Google Classroom teachers can use the Google Classroom button to assign this reso...
The following word bank contains words that may be covered when teaching about electromagnetism using the lessons and activities in this resource. 1. Alternating current (AC) 2. Ampere 3. Coil 4. Coulombs 5. Current 6. Direct current (DC) 7. DC voltage 8. Electric motor 9. Electrical current 10. Electrical energy 11. Electricity 12. Electromagnet 1...
Collections like this help educators find themed activities in a specific subject area or discover activities and lessons that meet a curriculum need. We hope these collections make it convenient for teachers to browse related lessons and activities. For other collections, see the Teaching Science Units and Thematic Collections lists. We encourage ...
Introduction. “Impelled by a belief in the unity of the forces in nature, Michael Faraday sought, and in 1845 provided, the first phenomenological evidence for the connection between light and magnetism when he discovered the effect that still bears his name.
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Sep 22, 2022 · The Chemical History of a Candle was the title of a series of six lectures on the chemistry and physics of flames given by Michael Faraday at the Royal Institution in 1848, as part of the series of Christmas lectures for young people founded by Faraday in 1825 and still given there every year.
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Faraday's law of induction is one of the important concepts of electricity. It looks at the way changing magnetic fields can cause current to flow in wires. Basically, it is a formula/concept that describes how potential difference ( voltage difference ) is created and how much is created.
