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Electricity Magnetism -- Electromagnetism

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Electricity Magnetism -- Electromagnetism

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    1. Electricity & Magnetism -- Electromagnetism

    2. Moving electrons (electricity) --> magnetism 1. Electromagnet More coils, or more current (more power source) = stronger magnet 2. Motor Permanent magnet interacts with temporary magnet to produce motion

    3. Moving magnets --> electricity 1. Electromagnetic “induction” (science sex) EM Induction = to force current to flow 2. Generator The direction of current (electron flow) is dependent on: Direction the magnet (or coil) moves Poles of magnet

    4. History Du Chatelet -- F=mv2 (F=ma) LaVoissier -- Conservation of Mass Faraday -- magnetism makes electricity Maxwell -- electricity makes magnetism Meitner and Hann -- break apart atoms Einstein -- E = mc2

    5. Electric and Magnetic Fields (We do a lab/webquest in the library next class to help you understand).

    6. E & M Fields are VECTORS Vectors = represented by arrows Length of arrow = strength/magnitude Direction of arrow = direction of field

    7. More Rules for Field Lines The lines of force represent the path a particle with a small positive charge would take if released in the field.

    8. THE END OF NOTES Next Class: meet here (G202) and review generator/motor labs, then to the library for web lab. E-M quiz: Wed/Th next week NOW -- Bill Nye: Electric Circuits!

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