Key Terms Chapt 4

29 terms by Rhonda_Garnick 

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ampere

used to measure the rate of current flow in the circuit

atom

building blocks, in all matter, consist of 100 different subatomic prticles

binding energy

energy that holds a electron in each shell

chemical compound

a substance that consists of only one type of molecule

circuit

continuous path

conductor

metals that allows electric charges to drift or flow

current

is the quantity of electron flowing in a circuit

electromagnetic energy

consist of light, x-rays, radio waves, microwaves, and other forms of energy

electron

negative charge, fundamental particle that orbits nucleus of atom

element

is a substance made up of only one type of atom

frequency

is the number of times per second that a crest passes a given point

intensifying screen

plates coated with fluorescent crystals

ionization

produces an atom with an electric charge, neutral atom gains or loses an electron, protons and electron no longer equal

kilovolt peak kVp

used to measure the potential difference across an x-ray tube, equals 1000 volts

mass

quantity of matter that makes up any physical object

matter

everything of a physical nature in the universe

milliampere

equal to 1/1000 of an ampere (0.001 A)

molecules

two or more atoms may combine chemically to form this

neutron

neutral charge, fundamental particle in nucleus of atom

nucleus

formed by neutrons and proton of atom, its center

photon

the smallest possible unit of electromagnetic energy

potential difference

the force or strength of the electron flow in the current

proton

positive charge, fundamental particle of the nucleus of the atom

rectification

process that an alternating current can be converted so that it flows in one direction only

resistance R

any property of the circuit that opposes or hinders the flow of current

sine wave

repeating wave, sinusoidal form

transformer

device used to produce the high voltage needed for x-ray production

volt V

unit used to measure potential difference, one volt is the quantity of potential difference needed to cause a current of 1A to flow in a circuit with a resistance of 1ohm

wavelength

distance from one crest to the next

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