Making Speakers - Instructions & Activities
Students' motor made in class today...
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The motor principle is basically the FORCE that a current carrying wire experiences when interacting with an EXTERNAL MAGNETIC FIELD. Oersted's principle says that a wire carrying electricity has a magnetic field around it - so if there is another external field near it then the wire will experience either a repulsive force or attractive force (the interaction of the two magnetic fields). Handouts:
The video below shows how a coiled wire with electricity running through it is attracted to and repulsed by an external magnetic field (depends on the direction of the current in the wire) Today we are doing two things: 1. Make an electromagnet and review our work from Firday 2. Learn about and use the electromagnet equation. (try the link to check your answers!) Today we further investigated the application of Oersted's Principle, ran current through wire to see how it deflected the compass needle, and coiled the wires to show how constructive reinforcement of this magnetic field could be used to produced an electromagnet... Today we watched the first part of E=mc2. We learned about Michael Faraday's amazing discoveries and insights into the connection between electricity and magnetism and the development of the branch of physics called electromagnetism. We also learned Oersted's Principle and the Right Hand Rule (we did practice on this and will work on a practice sheet on Monday) >> E=mc2 Movie >> Online Applet for Oersted's Principle >> Right Hand Rule Advanced Explanation of how Magnets "Work" Today we investigated the fundamental properties of magnetism and introduced the domain theory of magnetism. We also started to learn about the link between electricity and magnetism - simple demonstration.Domain Theory of Magnetism - Explained introduction to courseWe will go over some basic expectations and rules of the classroom as well as the course outline. fundamentals of magnetismWhat is magnetism? What are magnets? We will investigate the mysterious nature of magnets. We will learn to draw magnetic fields and learn what they look like. Magnetic Field Lines - Good Explanation + You are required to watch this 3 minute video for homework. |
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June 2015
Christopher BraunGRADE 11 PHYSICS |