1. Fields and Conductors
Actually make sense

2. Electrostatic Equilibrium
Requires no field inside a conductor.
Unbalanced charges at conductor’s surface.
External field perpendicular to conductor surface

3. Internal charge +q

4. Internal charge +q

5. Hollow conductor +q

6. Hollow conductor Inside: field from point charge +q +q –q
Between: zero field
Outside: field from point charge +q

7. Electric Flux FE
Conceptually, the number of electric field lines passing through a surface E
FE = EA
A = area of the surface

8. Electric Flux FE
Previous formula only works when field is normal to the surface E
FE = 0

9. Electric Flux FE E q Area in profile is A cos q
q = angle of E field from surface normal
FE = EA cos q