E&M Ch. 32

electrostatics

electricity at rest

electrical forces

pair of attractive/repelling forces from atom particles

atoms

positively charged nucleus with negatively charged electrons

like charges repel, opposites attract

fundamental rule of electrical forces

ion

charged atom

conservation of charge

electrons are not created nor destroyed, only transferred

coulomb

SI unit of charge, abbreviated C

conductors

surfaces w/ “loose” electrons, free to roam in material and not anchored to nucleus

insulators

electrons tightly bound, poor conductors of electricity and heat

semiconductors

materials that can be made as insulators or conductors

superconductors

materials with 0 resistance to flow of charge

charging by contact

transfer of electrons by touching

induction

charging of object without contact

grounding

charge moves off/onto conductor by touch

electrically polarized

1 side of atom/molecule more charged, induced

electric dipole

more negative charge on 1 side than the other