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PHY 182, Spring, 2005
Week 12
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Main Objectives:
- Be able to calculate the force on a current due to a magnetic field
- Be able to find the torque on a current loop in a constant magnetic field
- Be able to explain how a galvanometer works
- Be able to use Lenz's and Faraday's laws to find the magnitude and direction of the
current induced by a changing magnetic field
- Be able to define magnetic flux
- Be able to explain how an electric field induced by a changing magnetic field is
different from the electric fields we have studied previously
- Be able to explain how an AC generator works
- Be able to explain how transformers work
- Be able to define inductance and discuss how it is analogous to our definition of
capacitance
- Be able to find current as a function of time in an RL circuit
- Be able to combine inductors in series and parallel
- Be able to discuss how energy is stored in an inductor and apply this to understanding
oscillations in an LC circuit
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| Tuesday |
Examples using magnetic forces on charged particles. Examples of
magnetic forces and torques on currents. Outside of class: Read Ch. 33
Sec. 1-5. Do Ch. 33 workbook exercises 1, 10, 11, 12, and 13. Complete Ch. 32
homework: 26, 28, 30, 33, 36, 37, and 41. (Due Thursday) |
| Thursday |
Demonstrations and practice with Lenz's law and Faraday's law.
Discuss motional emf, generators, and induced electric fields. Outside of
class: Read Ch. 33 Sec. 6-10. Do Ch. 33 workbook exercises 25, 29, 30 and
32. Complete Ch. 33 homework: 5, 10, 12, 25, and 44. (Due Tuesday.) |
| Friday |
Begin discussion of inductors in circuits including energy stored in an
inductor and circuits containing both inductors and capacitors. Outside of
class: Read Ch. 34 Sec. 1-5. (I don't really care if you can follow all
the math in this chapter. It is the ideas that are important.) Complete Ch. 33
homework: 15, 19, 54, 67, 72 and 74. (Due Tuesday) |
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