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Transcript
Welcome Back Scientists! 1. 2. 3. 4. Today: Return Electromagnets Inquiry Scores Discuss the Revision Process Interactions between permanent and Electromagnets: Building a Motor More on Magnets and Electricity Making an Electric Motor Follow the Instructions Carefully!! We Know That Electric Currents Produce Magnetic Forces So moving electrons create a magnetic force And magnetic fields can interact to create motion (motors!) But what about the opposite? What is the effect of magnetic force on electrons? http://phet.colorado.edu/en/simulation/legacy/faraday https://www.youtube.com/watch?v=yA8gZM3fghc So magnetic fields can cause electrons to move in a wire And electrons moving in a wire is called… Electricity!!! – so the reverse process of a motor GENERATES electricity (what do you think we call that? So… Electricity creates magnetism which we use to create motors that change electrical energy into kinetic energy And kinetic energy can be used to move magnets around coils of wire This creates a current in the wire The current in the wire can be transmitted and used by other things (like motors)