1. Bellwork
Pull out your work on the project from last week

2. Opening question
What is static electricity and where does it come from?

3. Bellwork!!!
What causes an object to become “charged”

4. Bellwork
See whiteboard on left

5. Static electricity

6. Major ideas Insulator- does not allow electrons to move easily
Conductor- allows for the easy flow of electricity

7. John Travoltage
travoltage_en.html

8. Major concepts from John Travoltage
Static charges spread out
Static charges take a greater concentration (voltage) to arc farther distances

9. Electron Affinity A property of a material
How badly a material “wants” electrons
A material with a high electron affinity will steal electrons from a material with low electron affinity
This generally isn’t given a number but is qualitative.

10. Polarization
electricity/latest/balloons-and-static-electricity_en.html

11. Major concepts of polarization
Charges can attract or repel the valence shell electrons of a neutral object.
This changed distance will create an attractive force between ANY charged object and a neutral object
Polarization is much weaker than Coulombic attraction

12. Polarization
2 THINGS ATTRACTING DOES NOT MEAN THEY ARE OPPOSITELY CHARGED
In order to know that something is charged it MUST be able to repel something

13. Electric fields

14. The major concepts
Lines= direction a positive particle goes in the field
Asymptotes exist between two like charged particles
Quantum Shielding– cool extra you wont be tested on…

15. Rutherford
scattering/latest/rutherford-scattering_en.html