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Understanding Electric Fields: Concepts, Applications, and Examples

This comprehensive overview explores the concept of electric fields, detailing what they are and their significance in physics. We discuss the construction of electric fields, including the electric field of a point charge, superposition principles, and key applications like cathode ray tubes. Problems are presented to determine electric field strength and direction, enhancing understanding through practical examples. Finally, we delve into the behavior of conductors in electric fields, illustrating practical implications in real-world scenarios.

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Understanding Electric Fields: Concepts, Applications, and Examples

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Presentation Transcript

  1. DAY 25 Electric Fields

  2. What is an Electric Field? Who cares? Slide 20-34

  3. What is an Electric Field? Who cares? Slide 20-34

  4. Constructing the Electric Field Slide 20-34

  5. Constructing the Electric Field Slide 20-34

  6. Constructing the Electric Field Slide 20-34

  7. The Electric Field of a Point Charge Slide 20-35

  8. The Electric Field model Slide 20-34

  9. Superposition of Electric fields Slide 20-34

  10. Example Problem Determine the magnitude and the direction of the electric field at point A. Slide 20-70

  11. Dipole Electric Fields Field lines Slide 20-45

  12. Electric Field Lines Slide 20-50

  13. Uniform Electric Fields Slide 20-45

  14. Cathode ray tube Slide 20-55

  15. Examples The CRT (cathode ray tube) needs the electrons to exit with speed 6E7 m/s. What electric field strength is necessary? b. A uniform electric field of 1.5E5 N/C is used to deflect the beam. What angle? Slide 20-55

  16. Conductors and Electric Fields Slide 20-55

  17. Conductors and Electric Fields A positively charged (non-metallic) sphere is places over a metal plate with a net negative charge. Slide 20-55

  18. Conductors and Electric Fields A positively charged (non-metallic) sphere is places over a metal plate with a net negative charge. Slide 20-55

  19. Forces and Torques on Charges in Electric Fields Slide 20-56

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