1 / 85

Electric field and Potential

Electric field and Potential. Tutoring schedule. Recall the Electric Field?. Recall the Electric Field?. Field lines?. Useful conceptualization of the electric field. Field Lines:. Field Lines:. A field line always Begins on a positive charge (or infinity)

edith
Download Presentation

Electric field and Potential

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Electric field and Potential Tutoring schedule

  2. Recall the Electric Field?

  3. Recall the Electric Field?

  4. Field lines? Useful conceptualization of the electric field.

  5. Field Lines:

  6. Field Lines:

  7. A field line always • Begins on a positive charge (or infinity) • Ends on a negative charge (or infinity)

  8. Figuring field lines

  9. Field Lines:

  10. Field Lines: Big step!

  11. Field Lines:

  12. Field Lines: Big step!

  13. Field Lines: Big steps give rough idea of field lines

  14. Field Lines: Lot’s of little steps more accurate

  15. A any point along a field line, the electric field points in the direction tangent to the line. But the field line by itself tells us nothing about the magnitude of E

  16. Note: color Scheme is backward

  17. Note: Electric field lines are not the path a test particle would follow Hockey demo again !! http://phet.colorado.edu/en/simulation/electric-hockey All they do is indicate the direction of the electric field (at any given point). But, you can get a little more info too …

  18. Magnitude of electric field Is related to the spacing of adjacent lines The closer the spacing, the stronger the field

  19. Electric Fields and conductors: Conductor ↔ charges free to move

  20. Electric Fields and conductors: Conductor ↔ charges free to move + + + − + − + − + − − −

  21. How it works:

  22. How it works:

  23. How it works:

  24. How it works:

  25. How it works:

  26. How it works:

  27. How it works:

  28. How it works:

  29. How it works:

  30. How it works: Eventually …..

  31. How it works: The mobile charges rearrange themselves until everywhere in the conductor

  32. So in the static case : • Electric field is zero inside a conductor • No Net charge on the inside of a conductor • free charge must all be on surface • Electric field just outside the conductor must be perpendicular to the surface! • Magnitude of this Electric field is related to the density of charge on the surface at that point. (Gauss’s Law again)

  33. Van de Graff again:

  34. Van de Graff again:

  35. Van de Graff again:

  36. Van de Graff again:

  37. Van de Graff again:

  38. Van de Graff again:

  39. Van de Graff again:

  40. Van de Graff again:

  41. Van de Graff again:

  42. Van de Graff again:

  43. Van de Graff again:

  44. Van de Graff again:

  45. Van de Graff again:

  46. Van de Graff again:

  47. Van de Graff again:

  48. Van de Graff again:

More Related