01 electrostatics intro
- 3. Recall: Atomic Structure p+ (+ve charge) and n0 (neutral charge) are found in the nucleus. Protons 3
- 5. Recall: Atomic Structure The ONLY time a p+ or n0 leaves the atom is if the atom is radioactive. Nucleus 5
- 6. Recall: Atomic Structure e- (-ve charge) are found outside the nucleus. They can move between atoms and flow freely. Electrons 6
- 7. Recall: Atomic Structure Neutral atoms or objects have equal amounts of e- and p+. +-+ -+-+ -+- 7
- 8. Recall: Atomic Structure -vely charged atoms or objects have more e- than p+. +--+ -+--+- -+--- 8
- 9. Recall: Atomic Structure +vely charged atoms or objects have more p+ than e-. +++ -++- 9
- 10. Introduction to Electrostatics The Greek philosopher Thales (600 B.C.) was the first to record electric observations when he rubbed amber with fur.
- 11. Introduction to Electrostatics The amber could attract small objects.
- 12. Introduction to Electrostatics Materials that attract other materials after rubbing are charged. This occurs because electrons move from one object to another.
- 13. Introduction to Electrostatics A negatively charged object has more electrons than protons (excess e− ). +--+ -+--+- -+---
- 14. Introduction to Electrostatics A positively charged object has fewer electrons than protons (deficit of e − ). +++ -++-
- 15. Introduction to Electrostatics A neutral object has an equal number of +ve and -ve charges. +-+ -+-+ -+-
- 16. Introduction to Electrostatics Static Electricity: Charges that remain stationary on the surface of an object ("static" means "not moving").
- 17. Introduction to Electrostatics Electrostatics: The study of static electric charge.
- 18. 3 Laws of Electric Charges 1) Like charges repel each other.
- 19. 3 Laws of Electric Charges 2) Opposite charges attract each other.
- 20. 3 Laws of Electric Charges 3) A charged object will attract a neutral object.
- 21. 3 Laws of Electric Charges 3 important rules: i)Objects with like charges repel each other. ii)Objects with opposite charges attract. iii)Neutral matter is attracted to charged matter. Charge Charge Attract or Repel? +ve +ve Repel -ve -ve Repel +ve -ve Attract Neutral +ve Attract Neutral -ve Attract 21