Physics Test 3

Front 1

a fundamental physical property

Back 1

charge

Front 2

unit for charge

Back 2

coulomb

Front 3

what is the variable used for charge

Back 3

(Q)

Front 4

build up of charge on the surface on an object

Back 4

static electricity

Front 5

the force that defines the attraction/repulsion

Back 5

coulomb force

Front 6

all charged objects have fields associated with them

Back 6

electric fields

Front 7

a charged object is dropped close to another object and charge is induced on the surface

Back 7

induction

Front 8

a charged atom that has either lost or gained electrons

Back 8

ion

Front 9

charge can move freely

Back 9

conductors

Front 10

charge can't move freely

Back 10

insulators

Front 11

in between metal and nonmetal on the periodic table

Back 11

semiconductors

Front 12

two ways materials can be charged by

Back 12

friction, contact, induction

Front 13

the name given to a wide range of electrical phenomena

Back 13

electricity

Front 14

the terms positive and negative refer to this

Back 14

electric charge

Front 15

suggest that the electrons are spread out over a spherical region

Back 15

shell

Front 16

what are good conductors

Back 16

metals

Front 17

what are good insulators

Back 17

glass

Front 18

how do you charge things

Back 18

by transferring electrons from one place to another

Front 19

the unit of measurement for electric potential

Back 19

voltge

Front 20

general term for electrical phenomena

Back 20

electricity

Front 21

the study of electric charge at rest

Back 21

electrostatics

Front 22

electric charge is neither created nor destroyed

Back 22

conservation of charge

Front 23

the relationship between electrical force, charge, and distance

Back 23

coulomb's law

Front 24

any material having free charged particles that easily flow through it when an electric force acts on them

Back 24

conductor

Front 25

a material without free charged particles and through which charge does not easily flow

Back 25

insulator

Front 26

a material with properties that fall between a conductor and an insulator and whose resistance can be affected by adding impurities

Back 26

semiconductors

Front 27

a material that is a perfect conductor with zero resistance to the flow of electric charge

Back 27

superconductor

Front 28

transfer of electric charge between objects by rubbing or simple touching

Back 28

charging by contact

Front 29

redistribution of electric charges in and on objects close by but not in contact

Back 29

charging by induction

Front 30

term applied to an atom or molecule in which the charges are aligned so that one side has a slight excess of positive charge and the other side a slight excess of negative charge

Back 30

electrically polarized

Front 31

defined as electric force per unit of charge, it can be considered to be an aura surrounding charged objects and is a storehouse of electric energy

Back 31

electric field

Front 32

the energy a charged object possesses of its location in an electric field

Back 32

electric potential energy

Front 33

the difference in electric potential between two points, measured in volts.

Back 33

potential difference

Front 34

the flow of electric charge that transports energy from one place to another

Back 34

electric current

Front 35

the property of a material that resists electric current, measure in ohms

Back 35

electrical resistance

Front 36

the statement that the current in a circuit varies in direct proportion to the potential difference or voltage across the circuit and inversely with the circuit's resistance

Back 36

ohm's law

Front 37

electrically charged particles flowing in one direction only

Back 37

direct current

Front 38

electrically charged particles that repeatedly reverse direction, vibrating about relatively fixed positions

Back 38

alternating current

Front 39

the rate of energy transferm or the rate of doing work

Back 39

electric power

Front 40

an electric circuit in which electrical devices are connected along a single wire such that the same electric current exists in all of them

Back 40

series circuit

Front 41

an electric circuit in which electrical devices are connected in such a way that the same voltage acts across each one, and any single one completes the circuit independently of all the others

Back 41

parallel circuit

Front 42

devices that impede the flow of charge

Back 42

resistors

Front 43

when resistance increases what happens to current

Back 43

decreases

Front 44

in which circuit is current equal all the way around

Back 44

series

Front 45

in which circuit is voltages equal all the way around

Back 45

parallel

Front 46

the region of magnetic influence around a magnetic pole or a moving harged particle

Back 46

magnetic field

Front 47

clustered regions of aligned magnetic atoms

Back 47

magnetic domains

Front 48

a magnet whose field is produced by an electric current, it is usually in the form of a wire coil with a piece of iron inside the coil

Back 48

electromagnet

Front 49

related to charges in motion

Back 49

magnetism

Front 50

all magnets have

Back 50

both a north and sole pole

Front 51

can pass through the loop during a current

Back 51

magnetic field

Front 52

the amount of magnetic field lines have to be what to get a current

Back 52

changing/moving

Front 53

between a magnetic field and moving charged particle it is a deflecting force due to the motion of the particles so will be greater when the charged particles move perpendicular to the field and smallest when it moves parallel to the field lines

Back 53

magnetic force

Front 54

the induction of voltage when a magnetic field changes with time

Back 54

electromagnetic induction

Front 55

an electric field is created in any region of space in which a magnetic field is changing with time

Back 55

farady's law

Front 56

an electromagnetic induction device that produces electric current by rotating a coil within a stationary magnetic field

Back 56

generator

Front 57

a device for transferring electric power from one coil of wire to another, by means of electromagnetic induction, for the purpose of transforming one value of voltage to another

Back 57

transformer

Front 58

a magnetic field is created in any region of space in which an electric field is changing with time

Back 58

maxwell's counterpart of faraday's law

Front 59

unite for current

Back 59

amp

Front 60

what amount of current could be faital

Back 60

0.07

Front 61

what is different between magnetic field lines and electric field lines

Back 61

electric field lines spread out from source and magnetic field lines curve back on its source

Front 62

result from an interaction of charged particles from sun and the earth's magnetic field which get accelerated and produce light

Back 62

northern lights

Front 63

a changing magnetic field in a closed loop ( conductor) will result in an induced current

Back 63

electromagnetic induction

Front 64

when can you only have a current

Back 64

when have a potential difference (voltage)

Front 65

in electromagnetic induction what are you really inducing

Back 65

voltage which produces current

Front 66

what will be the voltage in you have more loops

Back 66

more voltage

Front 67

what will be the voltage if you have a smaller area

Back 67

less voltage

Front 68

each loop in a coil interacts with the magnetic field around the current in other loops of the same coil

Back 68

self-induction

Front 69

what is almost all of electric energy in the form in

Back 69

alternating current

Front 70

the induced voltage in a coil is proportional to the product of its number of loops, the cross- sectional area of each loop, and the rate at which the magnetic field changes within those loops

Back 70

farady's law

Front 71

built AC plant showing you could use induction to create enough electricity to light up a city

Back 71

tesla and westinghouse

Front 72

what is the electricity from powerplants

Back 72

AC

Front 73

used to reduce (change) voltage that come into your home

Back 73

transformer on telephone poles

Front 74

built the first battery

Back 74

volta

Front 75

though he discovered a "life force" because of the movement in the frog's leg

Back 75

galvani

Front 76

proved that wasn't a "life force" but a phenomena dealing with two different metals and fluid in the frog's leg

Back 76

volta

Front 77

an electrical device in its simplest form a pair of parallel conducting plates separated by a small distance that stores electric charge and energy

Back 77

capacitor

Front 78

what is the relationship between electric force and electric field

Back 78

electric force is the interaction of two charges which electric field shows the interaction between the charges

Front 79

what will happen to a moving charge if it enters a magnetic field

Back 79

the magnetic character of charge in motion experiences deflecting force where force is greatest when move perpendicular to magnetic field

Front 80

what is the direction of a magnetic field that is created by current in a straight wire

Back 80

the direction of magnetic field is curve and back on it source

Front 81

why is some iron magnetized while other iron is not

Back 81

domains in ordinary iron are not aligned