physical science test 9 exam (chapters 9-12)

opposite charges attract, but like charges repel

an automatic switch that opens when current overloads a circuit

electricity flows in one direction

diamond that has no unpaired electrons and is slightly repelled by either

the study of nature, behavior, and uses of static electricity and related phenomena

balance of positive and negative = no electric charge

transferring of electric charge by direct contact

flow of charge from one place to another

simplest form of electricity

device that opens or closes a circuit

SI unit for current

SI unit for electric charge

SI unit of power

unit of resistance

SI unit for voltage

positive type of electric charge

negative type of electric charge

an electrical device designed to hinder current flow

most common way of dissipating charges

material that allows electric current to flow easily through it

materials that are not good insulators or conductors

how strong the magnetic force acts through a material

semiconductor that produces light at low temperature; most efficient

most common type of generator used today

semiconductor device that produces electric current through the photovoltaic effect

converts electricity into sound waves

converts sound waves into pulses of electricity

electric switch operated by electromagnet

converts electricity to back and forth motion

uses electromagnets to allow communication over long distances

negative terminal of a voltaic cell

early device used to store electric charge by Musschenbroek

produces light from a filament heated to high temperatures; first suitable to use at home

device for protecting buildings and other structures from lightning strikes

devices that increases or decreases voltage

one or more electrochemical cells connected to terminals as single source of current

discharge that is an accumulation of electrons around pointed objects that results in an eerie blue glow

positive terminal of a voltaic cell

system of long and short clicks to communicate

discovered electromagnetic induction

invented the lightning rod and discovered that lightning is caused by static electricity

invented the first electrostatic generator

invented the telegraph

small AC generator that recharges battery of car

electrostatic method of reproducing images on paper

small inexpensive used by one user at a time

large, powerful designed for complex calculations

allows computer to communicate to outside world

part that controls all other systems of computer

largest computer network

single chip that contains a complete CPU

smallest accessible unit of data in computer

binary digit, either 0 or 1

type of semiconductor that adds electrons

physical components of a computer

memory used for temporary storage

systems saved for displaying images

information collected

stored info and instructions that direct a computer to perform tasks

electronic device processes info using electric circuit

modern device used to store electric charge

device that produces strong magnet field when electricity passes through it

narrow strip of metal housed in a protective case that burns out when current suddenly increases

produces a single binary output based on one or more binary outputs

consists of 3 electrodes

large computer for storing and retrieving vast info

type of data that constantly changes positions; any positions

number system based on powers of 16

semiconductor that lacks electrons

america’s first mass-produced computer