Conductors and Insulators

they have to wear hardhats, big shoulder things, gloves, under shirt, socks, and all _____ cotton, over shirts (fire retarted).

%100

It is the potential difference between 2 points. Typically a _______ (for our case) supplies the electromotive force to make current flow.

battery

why does static electricity move from you to an metal object after you have walked over the carpet. (We attract it)

it has no traction; opposite charges r attracted

iron is not used as electrical wiring in buildings. why?

it rust easily; corrodes

a magnetic field is an area around the magnet where the force of magnetism acts. The stronger the magnet the _____ _ ____ the field.

stronger and larger

When 2 object have collected static electricity and have the same charge what happens?

they repel

how can you tell when static electricity has been discharged?

you see a spark or a light released. You feel a shock

A moving magnet produces a current. Why?

-this is due to the magnetic field attracting the electrons in the wires - the magnetic field pulls on the electrons one way then pulls on them the other way making them move back and fourth producing a current (movement of electrons).

what 2 factors influence conductivity?

1.) temp. 2.) size & shape

_________ volts go through the power line.

500,000

the difference between a conductor and a insulator?

A conductor is a material that allows electrons to flow freely through it. An insulator is a material that resists the flow of electrons, so it does not allow electric current to pass through it.

___________ measures the strength of the current

Ammeter or current probe

________ measures the direction of the magnetic field

Compass

Materials that allow electricity to flow through them r?

Conductors

__________ the strength of the magnetic field

Magnetic Field Sensor

________ can measure voltage and current

Multimeter

Lightning happens when the ________ charges (electrons) in the bottom of the cloud are attracted to the __________ charges (protons) in the ground. Making a Spark (lighting).

Negative; Positive

how do charges attract each other?

Oposites attract

Nucleus of an atoms charge is?

Positive

Voltage starts in _______.

Power Plant

Example of Insulators:

Rubber, silk, wood, glass, ect.

__________ measures the strength of the voltage

Voltmeter or voltage probe

Electricity:

a type of energy that is the result of the accumulation (build up) of charges (protons (+) and electrons (-)) or the moveement of electrons

Anything wet is consdiered?

an conductor

Opposites charges _______ each other.

attract

Can charges (protons and electrons) be present without resulting in electricity? Justify your answer. Give a real life example to support your answer.

charges can be present without electricity being present. All objects have charges but not everything has electricity, most inanimate objects don´t have electricity present.

conductors work better in?

cold temperatures

All metals r ?

conductors

a material which allows electricity to pass through it is called a _______.

conductors

Years ago power lines were made of ____.

copper

Examples of Conductors:

copper, aluminum, gold, silver

exactly like a ________ in a river but with electrons instead of water !

current

what needs a circut to flow?

electricity

an _________ is where a magnetic field is produced by creating a current which produces a _______ _____. -a very strong electromagnetic is the one used to pick up piles of metal in a ________.

electromagnetic; magnetic field; junkyard

static electricity is th acumeletion of ___

excess electricity

the resistance of insulator is _____

extremly high

electrons that move away from their atoms cause?

static

Current is the __________of charged particles most often electrons.

flow or movement

Define the current in an a large body of water like the ocean or river?

flow or movement of water

remember force? Define force

force is an interaction between objects which has the POTENTIAL to make objects MOVE

Voltage is similar to ______ but instead of moving objects, voltage has the _______ to make electrons move (electromotive force).

force; potential

A non-metal that conducts electricity is_____

graphite

Partly blocked Conductor:

high resistance

Electric currents move where in their voltage size? (it decreases)

high to low

Electric currents move?

high to low

what r some things that could be used to see if there is a current running in a wire? How would they be used?

if its a large wire going through and electrical pole but if its a small wire like a fence wire you can test those. Can use a screwdriver to see if it can spark

Totally Blocked:

insulator

a material which does not allow electricity to pass through it is an ______.

insulator

Materials that do not allow a current to pass through them are called?

insulators

the more load on a wire the more it will ______.

stretched

a magnet is a piece of material that produces a ______ ______.

magnetic field

Blockages in the Conductor are _____ _____.

metal ions

Examples of Conductors:

metals, sea water, lemon juice, any liquid, concrete,

when an electrical current ______ in wires it produces a magnetic field. -this doesnt mean that there is a magnet in the wires

moves

where does electricity come from?

moving electrons

We have _____ a charge.

negative

Atoms have an what charge?

neutral

This is similiar to force and acceleration. - a stationary object has ________ (like a magnetic field) but when it is moving (current) is has acceleration.

no acceleration

Unblocked Conductor:

nothing is in its way, high currency of electricity. Allows easy flow of electricity

Elctrons come from ______.

nutrons and protons, in an atom

static electricity stays in _____ until it jumps into an object.

object

Trees and stuff have a?

positive charge

lightning starts in the clouds. What charge do clouds have?

positive on top and negative on bottom

When an object has potential, either electric or gravitational, that object has the ________ to move or make another object move.

potential

our power comes from a _____.

powerplant

what r the 2 thing in anuclues of an atom:

protons and Nutrons

What r the subatomic things in an atom?

protons, neutrons, and electrons

same charge _____ each other.

repel

Examples of insulators:

rubber, plastic, wood

Electric fields size depends on the size of an _____ object

size

But electromagnets can also be _______ , like those that go in computer hard drives.

small

Earth has a huge magnetic field around it which helps protect us from?

solar wind