EF: Electric Field
Micro-model of Charge, Q-transfer, Conductors vs. Insulators
Electric Forces and Coulomb's Law (method 1)
Combined Coulomb’s (electric forces) and Newton’s second laws practice problem
Two ping pong balls filled with air are tied to a very light 0.5 meters-long string. The loose ends of the strings are taped to the same position on a horizontal ceiling. When both are equally rubbed with the same material, they develop a static charge and repel each other, making an angle of 30° with respect to the vertical. (m = 3 grams)
With this experiment alone, can you tell what type of charge is on the balloon? Explain.
Is this a stable or unstable equilibrium?
Estimate the number of excess charges on each balloon. Clearly state any assumptions made in your estimation.
Field Model, Charges in an Electric Field
Electric Field from Point Charges
Electric Fields Patterns
Electric flux, and Gauss's law (method 2)
Electric Flux and Gauss's Law - Explained
Short review of Coulomb's law
Flux and electric flux
General conceptual understanding of Gauss’s law
Mathematical representation of Gauss’s law
How to drive the electric field of a point charge using Gauss’s law