AP 2: Induction

• • Some more induction related demonstrations: 

  • 27:16 to 31:25 Induced emf in one single loop of different size/shape loop around a solenoid. 

  • 31:25 to 33:40 Induced emf in one single loop vs. the induced emf in a 3-loop coil around a solenoid, and the idea behind transformers. 

  • 33:40 to end Induced emf and induced electric field are not conservative – this is something very unintuitive, and as Professor Lewin said, “It will blow your mind”!

  • Lec 16 | MIT 8.02 Electricity and Magnetism, Spring 2002 http://www.youtube.com/watch?v=G3eI4SVDyME (Update: MIT indefinitely removes online physics lectures and courses by Walter Lewin for good reasons. However, you can still watch this video at https://www.youtube.com/watch?v=FUUMCT7FjaI . I place this link here because I cannot find anything with equivalent or better quality (in terms of physics content). I do not condone Lewin's terrible behavior. For your safety, students should not contact Lewin in any way.)

  • Physics Demo -- Jumping Ring http://www.youtube.com/watch?v=Pl7KyVIJ1iE

  • MIT Physics Demo -- Levitating Magnet http://techtv.mit.edu/videos/823-mit-physics-demo-levitating-magnet or http://www.youtube.com/watch?v=X54gibrRgIA

  • Physics Demo – Superconductor Levitating a Magnet http://www.youtube.com/watch?v=pPBsxylW2Z0

  • Eddy current: 

  • 35:58 to 41:52 The damping of a metal-plate pendulum

  • 41:56 to 48:51 More magnetic damping demonstrations

  • Lec 17 | MIT 8.02 Electricity and Magnetism, Spring 2002 http://www.youtube.com/watch?v=qxuGDEz8wDg (Update: MIT indefinitely removes online physics lectures and courses by Walter Lewin for good reasons. However, you can still watch this video at https://www.youtube.com/watch?v=fOyuov4fimQ . I place this link here because I cannot find anything with equivalent or better quality (in terms of physics content). I do not condone Lewin's terrible behavior. For your safety, students should not contact Lewin in any way.)

                    Neodymium magnet in FAT copper pipe: http://www.youtube.com/watch?v=keMpUaoA3Tg&t=59 

Levitation Melting (Copper) with Induction Heating: http://www.youtube.com/watch?v=XaZ0A-5p4ao

                    Find out more on http://www.ambrell.com/videoindex.html.

Induction: page 1  (Videos: 1 to 5: Faraday's law of induction, Lenz's law)

Induction: page 2 (Videos: 6 to 10: Induction problems, multiple-choice questions)

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