MIT 8 02T  Introduction to Active Learning: Faraday’s Law (37 pages)
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Introduction to Active Learning: Faraday’s Law
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 37
 School:
 Massachusetts Institute of Technology
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 8 02t  Electricity and Magnetism
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Introduction to Active Learning Faraday s Law Today s Objectives Introduce key concepts from electricity and magnetism through discovery activities experiments concept questions discussion and visualizations Later in the course we will return to the same concepts Today we are just going to have some fun and get to know each other Introductions What we are trying to get a feel for You Tube Link http youtu be YywaJkGKOaY Concept Question Loop in Uniform Field While a rectangular wire loop is pulled upward though a uniform magnetic field B field penetrating its bottom half as shown there is 1 a current in the loop 2 no current in the loop 3 I do not understand the concepts of current and magnetic field 4 I understand the concepts of current and magnetic field but am not sure of the answer 5 Demo aluminum sleeve moving past fixed magnet students do this at their tables Demo we show the demo of magnet falling through plastic tube and aluminum tube 6 Seeing the Unseen Faraday s Law Applet Applet Faraday s law applet with a magnet and a coil http public mitx mit edu gwt teal FaradaysLaw2 html Play with the application until you are familiar with all the features In the Actions Menu try checking Motion on and unchecking Motion on manual mode You can use the buttons at the bottom to start pause and reset the simulation You can move the magnet and the ring back and forth using the mouse Let each person in the group have a turn Seeing the Unseen First Concept Flow Group Discussion Question What are some examples of flow of something through an area Examples of Flow Electric Current Flow Of Charge Electric Current I Charge Q flowing across area A in time t Q I t 9 Current and Magnetic Field Current produces a magnetic field as shown in figure 10 Magnetic Field of Bar Magnet 1 A magnet has two poles North N and South S 2 Magnetic field lines leave from N end at S 11 Seeing the Unseen Magnetic Field Run the Applet on motion on and stop the magnet when it is near the ring Scroll
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