Unit 2: Gauss' Law

symmetry

a sameness by reflecting (mirror symm) or rotating (rotational symm) about an axes

area vectors point _______

perpendicular to surface

electric flux

a measure of how much charge is on the other side of a barrier OR measure of average way electric field point through a surface

conductors + Gauss’ law

conductors cannot have volume charge density → excess charge moves to surface w/ E = 0 inside conductor @ equilibrium

electric potential vs. electric potential energy

EPE/UE:

* analogous to Ug
* exists as interaction
* objects always try to minimize UE
* mass is always positive, charge can be negative or positive
* positive and negative charge moves to where UE is minimum

EP/V:

* analogous to elevation/altitude
* exists independent of interaction
* mass always positive, charge can be negative or positive
* positive charge moves to where EP @ minimum while negative charge to to where EP @ maximum

Fe always _____ to equipotential surfaces

perpendicular

electric field is the _____ of electric potential

derivative