Fall 2001
Today's Lecture (10/17):Summary:
- Faraday's Law tells you that there will be a current induced when there is a change in flux if you have a conducting loop. If any part of the current is still in the field then there will also be forces on the current given by the Lorentz force law. We saw how a magnetic field acted as a brake for a conducting pendulum which entered it.
- If you have a changing flux, you don't really need a material to discuss what happens. Any imaginary loop will work. You should interpret the potential around the loop as being due to an electric field.
- Similar to the way that capacitance tells you the relationship between an electric field and the charge, inductance tells you how the magnetic flux through a loop is related to the current.
The N is there because inductors are typically made of many (N) loops of wire.
Conceptests:
Assignments:Next Reading Assignment (due 10/19)
Next Homework (due 10/31)
Diversion-of-the-week:This week I'm encouraging you to explore methods of creative thinking. I know, you're probably thinking creativity is not something that can be learned! But shouldn't you give it a try. The creativity web may just give you a few ideas.
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