Successful students should be able to:
- Understand the magnetic field produced by a long straight current-carrying wire, so they can:
- Calculate the magnitude and direction of the field at a point in the vicinity of such a wire. (IIID3a) (Knight 32.4)
- Use superposition to determine the magnetic field produced by two long wires. (IIID3b) (Knight 32.4)
- Calculate the force of attraction or repulsion between two long current-carrying wires. (IIID3c) (Knight 32.8)
- Understand the Biot-Savart Law, so they can:
- Deduce the magnitude and direction of the contribution to the magnetic field made by a short straight segment of current-carrying wire. (IIID4a1) (Knight 32.4)
- Derive and apply the expression for the magnitude of B on the axis of a circular loop of current. (IIID4a2) (Knight 32.5)
- Students should understand the statement and application of Ampere’s Law in integral form, so they can:
- State the law precisely. (IIID4b1) (Knight 32.6)
- Use Ampere’s law, plus symmetry arguments and the right-hand rule, to relate magnetic field strength to current for planar or cylindrical symmetries. (IIID4b2) (Knight 32.6)
- Students should be able to apply the superposition principle so they can determine the magnetic field produced by combinations of the configurations listed above. (IIID4b3) (Knight 32.6)
- Understand the force experienced by a charged particle in a magnetic field, so they can:
- Calculate the magnitude and direction of the force in terms of q, v, and, B, and explain why the magnetic force can perform no work. (IIID1a) (Knight 32.7)
- Deduce the direction of a magnetic field from information about the forces experienced by charged particles moving through that field. (IIID1b) (Knight 32.7)
- Describe the paths of charged particles moving in uniform magnetic fields. (IIID1c) (Knight 32.7)
- Derive and apply the formula for the radius of the circular path of a charge that moves perpendicular to a uniform magnetic field. (IIID1d) (Knight 32.7)
- Describe under what conditions particles will move with constant velocity through crossed electric and magnetic fields. (IIID1e) (Knight 32.7)
- Understand the force exerted on a current-carrying wire in a magnetic field, so they can:
- Calculate the magnitude and direction of the force on a straight segment of current-carrying wire in a uniform magnetic field. (IIID2a) (Knight 32.8
- Indicate the direction of magnetic forces on a current-carrying loop of wire in a magnetic field, and determine how the loop will tend to rotate as a consequence of these forces. (IIID2b) (Knight 32.9)
- Calculate the magnitude and direction of the torque experienced by a rectangular loop of wire carrying a current in a magnetic field (IIID2c) (Knight 12.5, 32.9)
Due date Day Assignment
4/1 Wed Read/Scan /Use Knight Chapter 32
4/7 Tue Do Chapter 32: 7, 11, 13, 14, 16, 18, 19, 20, 22, 23
4/10 Fri Do Chapter 32: 28, 32, 33, 36, 39, 47, 51, 56, 61, 65, 67, 74
4/10 Fri Lab 7: Magnetic field of a slinky
4/13 Mon Test Magnetism
- MIT's OpenCourseware presents Walter Lewin's videos for 8.02, the freshman electricity and magnetism class. MIT's equivalent of AP Physics C: Electricity and Magnetism.
- Prentice Hall's web page on Giancoli Chapter 20 Magnetism (no calculus)
- Haliday, Resnick and Walker's page on Chapter 29: Magnetic Fields (Calculus based)
- Haliday, Resnick and Walker's page on Chapter 30: Magnetic Fields due to Currents (Calculus based)
- The Magnetism Group in the Physics Department of Trinity College Dublin present this History of Magnetism
- William Gilbert (1544-1603), physician to Queen Elizabeth published one of the earliest scientific studies on magnetism De Magnete. He also studied and classified a number of materials that were capable of holding electrostatic charges when rubbed - testing more than the traditional amber and jet. This page is a brief biography from the Galileo Project.
- PSSC - A Magnet Laboratory (1959) Francis Bitter shows off the toys in MIT's Magnet lab.
- Japanese train engine magnetizes paperclips on the floor in this brief YouTube clip: Dancing Clip