Electric Charge and Coulomb's Law
| |
Table of Contents
#UCLA #Y1Q3 #Physics1B
Electric Charge
Key Definitions
Electric Charge (EC) - a property of a particle that causes it to experience a force in the proximity of other electrically charged particles
- Electromagnetic (EM) Force - the force associated with electric charges
- Coulombs [$C$] - measure of EC
- $e^-\approx-1.602\times10^{-19}\space C$
Conductors - conduct due to free valence electrons
Insulators - insulate due to lack of free electrons
Properties of Electric Charge
- Electromagnetic Force - all EC exerts a force on all other EC
- Conservation of Electric Charge - EC is not created/de4stroyed
- Electric Charge is Quantized - EC are determined in increments: integer multiples of the charged particle (e$^-$, p$^+$, etc.)
Charging by Induction

Charging by Induction, Ground Connection

Atomic Structure (Misc. Facts)
Nucleus - positive (protons), ~10$^{-15}$ m Electron Cloud - negative (electrons), ~10$^{-10}$ m (x100K nucleus)