Electricity

Front 1

Some matter tends to allow electrons to pass through it.

Back 1

conductors

Front 2

some matter will not allow electrons to move through it.

Back 2

insulators

Front 3

created by the flow of electrons through an object.

Back 3

electricity

Front 4

the study of non-moving electrons.

Back 4

electrostatics/ static electricity

Front 5

like charges repel each other.

Back 5

law of repulsion

Front 6

opposite charges attract each other.

Back 6

law of attraction

Front 7

Two different materials rubbed against each other. One of the materials becomes negatively charged, the other will be positive

Back 7

friction

Front 8

A charged object touches a neutral object, The neutral object will obtain the same charge as the original charged object

Back 8

contact

Front 9

A charged object is brought close to a neutral object, The neutral object will get the opposite charge as the original charged object.

Back 9

induction

Front 10

the simplest way to discharge or neutralize is the earth using a conductor. the earth is so large it removes all the access charge from the object

Back 10

grounding

Front 11

ex. static wicks on an airplane are used to pass electrons where they repel each other in the air.

Back 11

discharge at a point

Front 12

create static electricity

Back 12

electrons don't move,

friction,

contact,

induction,

Front 13

create current electricity

Back 13

electrons do move,

nuclear (40%),

wind turbines,

hydroelectric,

solar,

coal/natural gas,

Front 14

an electrical device needs a steady flow of electrons. they continue to flow if:

(eg holding hands in class activity)

Back 14

energy source,

a complete path of an electric circuit

Front 15

4 basic parts of a simple circuit

Back 15

battery,

electric load,

electric circuit control device,

conducting wires,

Front 16

what is electrical load

Back 16

converts electric energy to another form of energy

Front 17

what does a lightbulb convert energy into

Back 17

light and heat

Front 18

electric circuit control device

Back 18

a switch

Front 19

what are connectors

Back 19

connecting wires

Front 20

how do you measure an electric current

Back 20

measure with the ampere

Front 21

what is an ampere

Back 21

something you use to measure the electric current with.

Front 22

what's the symbol of the Ampere

Back 22

A

Front 23

formula for measuring electric currents

Back 23

I= Q over t

A= C over s

Front 24

I= Q over t

Back 24

I= current (amperes)

Q= number of electrons (coulombs)

t= time (seconds)

Front 25

A= C over s

Back 25

A= amperes

C= coulombs

s= seconds

Front 26

electrical energy

Back 26

the energy provided by the flow of electrons in an electric circuit.

Front 27

what are 2 main sources of electricity

Back 27

batteries, electric generation stations

Front 28

electric generation stations

Back 28

gives large amount of electric energy along this wires

Front 29

wet cells

Back 29

cells with liquid electrolyte

Front 30

dry cells

Back 30

cells with a paste of electrolyte

Front 31

primary cells

Back 31

electric cells that can't be recharged

Front 32

secondary cells

Back 32

can be recharged and reused

Front 33

parallel circuits

Back 33

when something is connected in parallel

Front 34

series circuits (eg. christmas lights)

Back 34

when its connected in one pathway from the source

Front 35

branch (circuits)

Back 35

each separate circuit is called a branch

Front 36

whats another name for potential difference

Back 36

voltage

Front 37

symbol for potential difference or voltage?

Back 37

V

Front 38

what is resistance measured in

Back 38

ohms

Front 39

what do charged objects attract

Back 39

neutral objects

Front 40

what does discharged or neutralized mean

Back 40

has all the excess charges removed

Front 41

whats another way you can discharge or neutralize an object

Back 41

exposure to air. If its a humid day the water molecules make the charge leak away faster, if its a cold dry day it leaks away slower

Front 42

How does a thunder cloud work

Back 42

inside the cloud ice and water particles separate and the negative fall to the ground while the positive charges rise from the earth. Then the two join and hit the ground

Front 43

how does a photocopier work

(don't have to memorize)

Back 43

an electrostatic works by moving the positive charges around in a pattern to be copied onto the surface of non conducting drum. Then it sprinkles negatively charged dry toner particles on the drum then melts it onto the paper

Front 44

How do electrical devices get a steady flow of electrons

Back 44

energy source, a complete path

Front 45

Electrodes

Back 45

Theres 2, one positively charged the other negative. They're both conductors

Front 46

Electrolyte

Back 46

A liquid or paste that can conduct an electric current

Front 47

What is potential energy

Back 47

energy stored in an object. Each electron has potential energy.

ex. a battery has chemical potential in the electrolytes because it can react with the electrodes making a different number of electrons