science ch. 13

study of nature, behavior, and uses of static (stationary) electricity and related phenomena

an object with the same number of positive and negative charges

what law states that opposite charges attract each other, but like charges repel each other

interactions between electrons and other charged particles

region around a charged object in which other objects are attracted or repelled by an electric force

imaginary lines that indicate the direction and strength of the field

SI unit for electric charge

what transfer of charge is through direct contact

what transfer of charge by just a short distance

diverting unwanted electric charges directly into the earth

simple device that uses the laws of electrostatics to detect small electric charges

what law states that the total charge is the same before and after an interaction

most common type of electrostatic generator in use today

the upward positive charge that forms lightning

what device is used to protect buildings and other structures from lightning strikes

what device that produces static electricity

a system that stores static electric charges

what is Musschenbroek's charge storing device

the method laser printers and photocopiers use

the electric charge that is most concentrated is at what point

the downward flow of charge that begins the lightning strike

an electric field in which strength is equal throughout

flow of electric charge from one end to another

regions of concentrated magnetism

what law states that unlike poles attract each other, but like poles repel each other

how strongly a magnet's force acts through a material is determined by the materials what?

form of the mineral magnetite known to have magnetic properties

imaginary lines indicating the direction and strength of a magnetic field

an area of concentrated magnetism in an object

what theory states our basic understanding of how a magnet works

a material with one unpaired electron per atom that is weakly attracted to magnets

substances having several unpaired electrons per atom

magnets made from hard material

most important cause of magnetism in magnetic materials

group of aligned atoms having a single magnetic field

substance with no unpaired elections and slightly repelled by either pole of a magnet (diamond)

device that produces a strong magnetic field when electricity passes through it

the name for the temperature above which a ferromagnetic material has no domains

force that changes the path of a charged particle moving through a magnetic field

amount in which the compass needle deviates form true north

phenomenon causes a vertical compass to point downward in the Northern Hemisphere

what do they call the two vast doughnut-shaped belts in the earths magnetosphere

lines connecting points of equal inclination

book by William Gilbert that say's earth has a magnetic field

boundary of the magnetosphere