PHYS 012 1st Edition Lecture 6 Outline of Last Lecture I. Electric Flux (Φ) = EAcosθII. Gauss’ Law: the electric flux through a closed surface is proportional to the net charge enclosed by the surfacea. Σ E cosθ ΔA = qenc/ε0b. ε0 = permittivity of free space = 1/4πk = 8.85 x 10-12 C2/(N*m2)c. E changes depending on where q is on the surface, but electric flux stays the samed. Charges outside of the surface will not change electric fluxe. σ = surface charge density = q/Af. ex) Spherical symmetryg. ex) Infinite plane of chargeThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.h. ex) Parallel infinite planes of opposite chargei. ex) Infinite line of charge- λ = linear density = charge/lengthOutline of Current Lecture III. Work done by a conservative force is equal to the negative change in potential energy (injoules).a. Wc = -ΔEPEb.IV. Electric Potential (V)a. V = EPE/q0 = kq/rb. Scalar quantityc. Different way to describe an electric fieldd. ΔVAB = ΔEPEAB/q0 = -Edq0/q0 = -Ede. ΔVBC = 0 ; VB = VCf. ΔVAC = -Ed = ΔVABg. Equipotential line: line on which every point has the same electric potential (ex. line BC on diagram above); perpendicular to electric field linesh. Equipotential surface: surface on which every point has the same electric potentiali. A positive charge that moves with the electric field will have a decreasing electricpotential energy. A negative charge that moves with the electric field will have anincreasing electric potential energy.j. Electric potential decreases further from the source
View Full Document
Unlocking...