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Electric Fields

Explore essential concepts in electromagnetism, including forces between charges, electric fields, Gauss's Law, electric potentials, capacitance, circuits, magnetic fields, induction, Maxwell's equations, and optics. Learn about Lenz's Law, superposition, and the small angle approximation.

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Electric Fields

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  1. Electric Fields

  2. 2006 P.1Concept: Forces between charges are action-reaction pairs (N3L)

  3. Spring 2005 P.3

  4. 2006 P.2Concept: Superposition (Vector sum) of E-fields

  5. 2006 P.3Concept: E Fields from charge distributions

  6. Electric Flux & Gauss’s Law Non-uniform E Uniform E

  7. 2006 P.5Category: Gauss’s Law & Electric FluxConcept: Net flux on Gaussian surface is generated by net enclosed charge

  8. 2005 P.5 Category: Gauss’s Law & Electric FluxConcept: Net flux on Gaussian surface is generated by net enclosed charge

  9. 2006 P.6 Category: Gauss’s Law & Electric FluxConcept: Definition of vector dot product EA E

  10. Electric potential of charge systems

  11. 2005 P.7Category: Electric PotentialsConcept: Superposition (not vectors!! Just add them up!!)

  12. 2005 P.8Category: Electric PotentialsConcept: Delta V is the line integral of E

  13. 2005 P.11Category: Electric PotentialsConcept: E is – dV/dx

  14. Capacitance

  15. 2006 P.10Concept: Physical Capacitor w/ dielectric

  16. 2005 P.12&13Concept: Series Caps= Same charge; Parallel Caps= Same Voltage

  17. Current & Circuits

  18. 2006 P.11Current & CircuitsConcept: Resistance of a conductor changes w/ temp.Strategy: Make a ratio

  19. 2005 P.17Current & CircuitsConcept: Current continuity and Ohm’s Law

  20. 2006 P.11Current & Circuits

  21. Magnetic Fields

  22. 2005 P.23 & 24Magnetic FieldsConcept: Net B is superposition (vector sum) of B from each current

  23. Induction & Inductance

  24. 2005 P.28Induction & InductanceConcept: Lenz’s Law- Induced current opposes the CHANGE in flux

  25. 2006 P.23Induction & InductanceConcept: Lenz’s Law- Induced current opposes the CHANGE in flux

  26. Maxwell’s EQ & EM Waves

  27. 2006 P.30Maxwell’s EQ & EM WavesConcept: Displacement current behaves like a current in a conductor and generates B-field

  28. 2005 P. 32 & 33EM WavesConcept: EM waves carry energy (@ speed c), transmit power and exert pressure

  29. Optics

  30. Optics

  31. 2006 P.35 & 36 Small angle approximation: Sin() ~ d/L

  32. 2006 P.35 & 36 Small angle approximation: Sin() ~ d/L

  33. 2006 P.36InterferenceConcept: Small angle approximation: Sin() ~ d/L

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