5.10a Generator PhET Lab

ntroduction: 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 were brought online to power other cities, includi ...

ntroduction: 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 were 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 magnetic 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: Procedure, Part I: • 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. (Use the Shapes tool in Word.) Light Grey Dark Grey Red Half Red and Half Black S N This study source was downloaded by 100000849331226 from CourseHero.com on 07-01-2022 10:08:38 GMT -05:00 https://www.coursehero.com/file/8887853/5-10a-lab-report1/Move the compass around the magnet. What happens as the compass moves in the magnetic field? The direction changes when the compass moves in the magnet 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 electrons 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 coil Results The direction changes to the North Changing Polarity Results The Direction of the Electron changes Changing Number of Loops Results Brighter Light Part III: Creating a Magnetic Field (Electromagnet) This study source was downloaded by 100000849331226 from CourseHero.com on 07-01-2022 10:08:38 GMT -05:00 https://www.coursehero.com/file/8887853/5-10a-lab-report1/• Just like a changing magnetic field (from a magnet moving in a magnetic field) can cause electrons to move, moving electrons can create magnetic fields. • Investigate how the properties of an electromagnet affect the magnetic field created. Changing Higher Voltage Results Stronger Resultant Field Changing Greater Current Results Stronger Magnetic Field Changing Voltages Results Direction changes Changing No current Results Strength of magnetic field vary Part IV: More Than Meets the Eye (Transformer) In a transformer, moving electrons in one coil create a magnetic field. When the created magnetic field interacts with a second coil, electrons can be forced to move in the second coil. Since the primary coil has four loops and the secondary coil has 1 to 3 loops, this is a step down transformer. Since when voltage in a transformer decreases, current increases by the same amount and power in the transformer is constant. • Investigate how the properties of a transformer’s secondary coil affect the current in the secondary coil. Changing Number of Loops in the Secondary Coil Results Electrons move faster as number of Loops increase Changing Decrease voltage This study source was downloaded by 100000849331226 from CourseHero.com on 07-01-2022 10:08:38 GMT -05:00 https://www.coursehero.com/file/8887853/5-10a-lab-report1/Results Electrons move slower Changing Increase Voltage Results Electrons move faster Changing Voltage Results Light begins to shine • Move the primary coil in and out of the secondary coil. • Change the primary coil to AC. What happens? When you change the primary coil to AC, the magnetic field begins to blink; when you move the primary coil in and out of the secondary coil it causes the light to shine bright. • With a DC primary coil, move the voltage slider back and forth. What happened? After moving the voltage slider back and forth, the direction of the magnetic field change. Part V: The Colorado River Runs Through It (Generator)