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Generator PhET Lab rev

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Generator PhET Lab rev2011 Introduction: Why was Hoover Dam (Boulder Dam) built eighty years ago? In 1936 the generators in the dam started transmitting power to Los Angeles and later generators w ... ere brought online to power other cities, including your hometown. When high-pressure water flows through the dam’s power plant, the water turns turbines in generators. A magnet in the generator spins in the generator’s magnetic field. This moving-magnet-in-a-magnetic field causes electrons to move, eventually ending up in your TV, ipod, Wii, etc. Important Formulas: F  qv B Fmag  BmagI emfmax  NAB N1V2  N2V1 P  IV Procedure, Part I: PhET Simulations  Play With Sims  Electricity, Magnets, and Circuits  Generator  Begin with the “Bar Magnet.” Click “See Inside” and observe the magnetic domains in the magnet and the field those domains create. Draw a diagram of the bar magnet in the box.  Move the compass around the magnet. What happens as the compass moves in the magnetic field? The direction changes when the compass moves inside magnetic field Part II: A Moving Magnet in a Magnetic Field (Pickup Coil)  What happens when a magnet moves through a coil in which electrons can move? _ When a magnet moves through a coil in which the electron can move it causes the light bulb to get brighter and brighter. Investigate the brightness of the light (current) as the number of loops is changed, as the speed of the magnetic changes, the area of the wire coil is changed, and the polarity of the moving magnet is changed. Changing speed of the magnet Results light is not as bright Changing area of the wire Results the direction changes to the north Changing polarity Results the direction of electron changes Changing no. of loops Results brighter light [Show More]

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