quiz 1 Flashcards
K
kilo 1,000
u
Micro 0.000,001
g
giga 1,000,000,000
n
nano 0.000,000,001
M
mega 1,000,000
m
milli 0.001
electron
negatively charged particle orbiting the nucleus, large in volume, small in mass
proton
positive charge particle orbiting the nucleus, large in volume and small in mass, determines the atom\ic number
neutron
uncharged particle in the nucleus, same size as proton, contributes to atomic mass
quark
small particles that make up protons and neutrons
valence electrons
an electron found in the outermost valence shell
atom
basic building block of the universe, an atom is the smallest part of an element
Molecule
makes up the smallest part of the compound, made up of at least 2 atoms
compound
2 or more elements combined in definite proportions
Ampere
unit of measure for electron flow, equal to 1 coulomb per second
energy
the total work done in an electrical circuit
power
the rate of doing electrical work
volt
unit of measure for electrical pressure, 1 volt is equal to the amount of potential required to cause 1 coulomb to produce 1 joule of work
relative size and mass of protons and electrons
protons weigh almost 1840 times more than electrons , electrons are about 1/1000 the size of protons
of valence electrons for an insulator
7-8
milli
1/1000
micro
1/1,000,000
nano
1/1,000,000,000
kilo
1,000
mega
1,000,000
giga
1,000,000,000
ohm
unit of measure for resistance to current flow
watt
unit of measure for rate of use of electrical power
joule
metric unit of energy equal to one watt-second amount of work done by 1 coulomb at 1 volt in 1 second
coulomb
measurement of quantity of electrons equal to 6.28 x 10^18 electrons
circuit
a complete path for current flow, includes a power source , load, and conductors
electromotive force
voltage, the force that pushes electrons through a conductor
impedance
the total opposition to current flow in an electric circuit, includes both resistive and reactive opposition
resistance
opposition to current flow in an ac or dc circuit, often described as frictional opposition to electron flow
electricity
the directed flow of electrons
horsepower
unit of measure for mechanical power in the English system
calorie
equal to the amount of energy required to raise the temperature of 1 gram of water by 1 degree Celsius
BTU
a measure of heat energy in the English system
difference between metric unit and engineering units
engineering units increase or decrease by units of 1,000
metric units exist in powers of 10
