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26 Cards in this Set

  • Front
  • Back
Law of electric charges
like charges repel and opposite charges attract
electric force
force between charged objects depends on size of charge and distance between charges
electric field
a region around a charged particle that can exert a force on another charged particle
friction
rubbing two objects together can cause electrons to be wiped from one object and transferred to another
conduction
electrons are transferred from one object to another by direct contact
Induction
charges in an uncharged object are rearranged without direct contact with a charged object
conservation of charge
no charges can be created or destroyed
detecting charge
use an electroscope
electroscope
a metal ball attached to a metal rod with two metal leaves hanging.
conductors
a material in which charges can move easily
insulators
a material in which charges can not move easily
Examples of conductors
copper, silver, aluminum, mercury
(metals)
examples of insulators
plastic, rubber, wood, glass
static electricity
the buildup of charges on an object
electric discharge
loss of static electricity as charges move off an object
lightning rods
pointed rod attached to ground by wire, placed at tallest point on a building
grounded
in contact with the earth
electric current
a flow of charges
cell
a devise that produces an electric current by converting chemical energy into electrical energy
battery
device composed of several cells
electrolyte
part of a cell, mixture of chemicals that converts chemical energy into electrical energy
electrodes
part of a cell, two different conducting materials in contact with the electrolyte
wet cell
liquid electrolyte
dry cell
solid or pastelike electrolyte
photocell
part of a solar panel that converts light into electrical energy
thermocouples
device that converts thermal energy into electrical energy