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PYSICS 30471 Electricity & Magnetism

PYSICS 30471 Electricity & Magnetism. Tuesday and Thursday 12:30-1:45 At DeBartolo, Room 119 By Prof. S. Frauendorf 125 NSH 1-3875 sfrauend@nd.edu. Office hours: Tuesday and Thursday 10:30-11:30. Homework: Every week, due on Tuesdays by 16:00.

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PYSICS 30471 Electricity & Magnetism

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  1. PYSICS 30471Electricity & Magnetism Tuesday and Thursday 12:30-1:45 At DeBartolo, Room 119 By Prof. S. Frauendorf 125 NSH 1-3875 sfrauend@nd.edu

  2. Office hours: Tuesday and Thursday 10:30-11:30 Homework: Every week, due on Tuesdays by 16:00. Will be provided as MS doc file in the 30471 course space. Late homework policy: Turned in within the week of the deadline: 75% within the following week: 50% later: 0% Graded HW back after 2 weeks.

  3. Grade Midterm Exam 30% Final Exam 40% Homework 30% Grades available on WebCT Teaching assistant: Sun Jie(Jason) , room 120 tel.:1-4743 jsun@nd.edu

  4. Style Combination of Powerpoint slides containing the most important results available in the course space phys30471.01 I:\coursefa.06\phys\phys30471.01 and handwritten notes derivations, explanations, …

  5. Syllabus Text: Introduction to Electrodynamics, David J. Griffiths, (3rd ed. 1999 ), Chapters 1-7 • Vector Analysis • Electrostatics • Special Techniques • Electric Fields in Matter • Magnetostatics • Magnetic Fields in Matter • Electrodynamics

  6. Advertisment What is electrodynamics, and how does it fit into the general scheme of physics?

  7. Natural phenomena are governed by the electromagnetic interaction.

  8. It governs our man-made world as well.

  9. It keeps the molecules together.

  10. Even where you do not expect it, the electromagnetic interaction is at work.

  11. Mechanics tells us the reaction of a body to a force. Forces are given.

  12. Electromagnetism is the theory two types of forces: Electric force Magnetic force

  13. small Quantum Mechanics Bohr, Heisenberg, Schrödinger, … fast Special Relativity Einstein Classical Mechanics Newton Quantum Field Theory Dirac, Pauli, Feynman, Schwinger, ….

  14. Macro world: q ~ e Quantization is unimportant. Imagine charge as some kind of jelly. Electric Charge (q, Q) • Charge exists as +q and –q. At the same point: +q-q=0 • Charge is conserved (locally). • Charge is quantized. +q =n (+e), -q = m (-e), m, n, integer electron: –e, positron: +e, proton: +e, C-nucleus: 6(+e) Charge conservation in the micro world: p + e -> n (electron capture)

  15. E q Light wave v = c The Field Formulation q q F

  16. electric + magnetic electromagnetic electromagnetic + optic electrodynamic electrodynamic + weak electroweak Four kinds of forces - interactions • Strong Keeps nuclei and nucleons together. • Electromagnetic Most common phenomena. • Weak β-decay n->p+e+ν • Gravitational Keeps the Universe together. Unification

  17. In Quantum Field theory the difference between particles and forces becomes rather diffuse. Two types of quantum particles: Fermions and Bosons.

  18. Systeme Internationale Mechanics length: meter (m) mass: kilogram (kg) time: second (s) force: newton ( Electromagnetism current: ampere (A) charge: coulomb (C = As) voltage: volt (V ) work: (W s = V A s) power: watt (W = V A) work: joule (J = N m) Power: watt (W = J/s) The equations of EM contain SI-Units

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