Links/Demos W07D1 MIT Tech TV: MIT Physics Demo -- Galvanometer Principle http://techtv.mit.edu/videos/812-mit-physics-demo-galvanometer-principle SHOCK WAVE: If you are using a Mac the latest Macs will not run shockwave, you must run shockwave from the instructor console Shock wave of magnetic field on the axis of a ring of charge: http://web.mit.edu/viz/EM/visualizations/magnetostatics/calculatingMagneticFields/RingMagInt/RingMagIntegration.htm Shock wave of magnetic field on and off the axis of a ring of charge: http://web.mit.edu/viz/EM/visualizations/magnetostatics/calculatingMagneticFields/RingMagField/RingMagField.htm EXPERIMENT LINKS: Magnetic field lines of a bar magnet http://tsgphysics.mit.edu/front/?page=demo.php&letnum=G%202&show=0 Deflection of a compass needle with a magnet http://tsgphysics.mit.edu/front/?page=demo.php&letnum=G%201&show=0 Galvanometer Principle http://tsgphysics.mit.edu/front/?page=demo.php&letnum=G%2010&show=0 Demonstrations You can see video of many of the demonstrations at http://tsgphysics.mit.edu/front/ Demonstration Description: Magnetic Field Lines of a Bar Magnet http://tsgphysics.mit.edu/front/?page=demo.php&letnum=G%202&show=0 A bar magnet is placed between two transparent sheets of plastic and placed on an overhead projector. Iron filings are sprinkled on the top then tapped lightly to make the field lines visible. A broken magnet can also be used to show that there are no monopoles. Magnetic Field Lines of a Bar Magnet (G 2) Demonstration Description: Deflection of a compass needle with a magnet http://tsgphysics.mit.edu/front/?page=demo.php&letnum=G%201&show=0 Deflection of a Compass Needle with a Magnet (G 1) A large bar magnet compass is deflected by hand magnet. This can be shown with the large screen TV. Demonstration Description: Galvanometer Principle http://tsgphysics.mit.edu/front/?page=demo.php&letnum=G%2010&show=0 Galvanometer Principle (G 10) A Helmholtz coil is connected to 125 VDC and produces a uniform "B" field between its coils. A separate coil is suspended within this field. Its direction of rotation and magnitude can be varied by the polarity and amount of DC current applied to it. A Hall probe Gauss meter can be used to search the field. MIT Tech TV: MIT Physics Demo -- Galvanometer Principle http://techtv.mit.edu/videos/812-mit-physics-demo-galvanometer-principle