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Electrostatics Flashcards

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13441277624ElectrostaticsThe study of electricity at rest (static means "at rest")0
13441277625Electrical ForcesProduced by the interaction of the charged particles found in atoms (lightning is an electrical force).1
13441277626Nucleus of the AtomPositively charged center of the atom. Made of protons (+) and neutrons (neutral). Charges cannot be taken from the nucleus.2
13441277627ElectronsNEGATIVELY charged part of an atom. They orbit the nucleus on the OUTSIDE of the atom and can be stripped away or added to atoms. All electrons are identical; they all have the same mass and negative charge.3
13441277628ProtonsPositively charged part of the atom, found in the nucleus. All protons are identical and have the same positive charge.4
13441277629Charge (q)A property of matter that comes in 2 types: positive (+) and negative (-). It is abbreviated with "q" and the unit of charge is the coulomb (c).5
13441277630NeutronNeutral part of the atom's nucleus. Neutrons have slightly more mass than a proton.6
13441277631Net chargeThe difference between the number of protons and electrons in an atom.7
13441277632Neutral atomEqual number of positively charged protons and negatively charged electrons8
13441277633Positively charged atomAtom with more protons than electrons - electrons REMOVED!!!9
13441277634Negatively charged atomAtom with more electrons than protons - ELECTRONS ADDED!!!10
13441277635Unlike chargesATTRACT!!!!11
13441277636Like chargesREPEL!12
13441277637IonAn atom that has a different number of electrons than protons.13
13441277638InsulatorSomething that does not let electrons flow freely, like plastic, rubber, glass & paper14
13441277639ConductorSomething that lets electrons flow through them freely, like metals.15
13441277640Law of Conservation of ChargeElectrons are neither created nor destroyed, they are simply transferred from one material to another!!! Protons always remain in the nucleus!16
13441277641Coulomb (C)The unit of electric charge, abbreviated "C". 1 C of charge contains 6.24 x 10^18 electrons or protons.17
13441277642Coulomb's LawThe equation that calculates the electric force between two charges in relation to distance. The strength (size) of the force is inversely proportional to the distance (as distance increases, force of charge decreases and visa-versa). IN THE PICTURE "d" HAS BEEN REPLACED WITH "r" - SAME VARIABLE - WE WILL USE "d"!!!18
13441277643Free electronsIn conductors, they are the electrons that can move around free of their atoms.19
13441277644Charge by frictionElectrons move between materials that are in contact, as when electrons are transferred between fur and a rod when they are rubbed together.20
13441277645Charge by conductionWhen a neutral object comes in contact with a charged object, electrons move between the objects, charging them both.21
13441277646PolarizationWhen a charged object is brought near a neutral object, but does not touch, and the charges inside rearrange and separate.22
13441277647Charge by inductionBegins with polarization - charges rearrange and then transfer23
13441277648QSymbol for Charge24
13441277649kCoulomb's Constant (9E9)25
13441277650Difference between Gravitational Force and Electrostatic ForceGravitational force is always an attractive force (it pulls things together). Electrostatic Force can be attractive or repulsive26
13441277651How Gravitational Force and Electrostatic force are similarBoth are inverse square relationships between force and distance27
134412776524 x biggerWHat happens to Fe when the distance between 2 charges is cut in half28
134412776531/9 as bigWhat happens to Fe when the distance between 2 charges is tripled29
134412776549x biggerWhat happens to Fe when the distance between 2 charges is reduced to 1/3 its original value30
134412776551/4 as bigWhat happens to Fe when the distance between 2 charges is doubled31
134412776562x biggerWhat happens to Fe if one of the charges is doubled in magnitude32
13441277657Positive chargescreate electric fields that point away from them33
13441277658Negative chargesCreate electric fields that point into them34
13441277659Heating by conductionHeat transfer through physical contact with a heat source (steak cooking while sitting on a cast iron skillet)35
13441277660Heating by ConvectionHeat transfer through fluid current circulation (Air conditioning = hot air rises, and cool air falls)36
13441277661Heating by radiationHeat transfer through electromagnetic waves (sun heating the Earth from afar)37

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