ELECTRICITY

ELECTRICITY
How electricity gets to your home?


 What is electricity?external image atom2.gif We use electricity everyday. Without it we would not be able to watch t.v., listen to the radio, have hot water, use a microwave to heat our food and many of the other things we do every day.

But what is electricityy?
First you have to know what an atom is. An atom is the smallest part of something. It is microscopic and every thing is made up of atoms.



Atoms are made up of three parts. There are :
external image atom.gif

Protons These parts of an atom have a positive charge. They are in the middle of the atom, called the nucleus and they do not move.

Neutrons These parts of an atom have no charge. They are neutral and part of the nucleus of an atom with the protons.

Electrons These parts of the atom are very small and weigh a lot less then the protons and neutrons. Electrons are not part of the nucleus of the atom, instead they move around in orbits outside the nucleus. Electrons are the only part of an atom that moves.

So what does this have to do with electricity?
Electricity is the flow of moving electrons. When the electrons flow it is called an electrical current. 

When electricity gathers in one place it is known as static electricity (the word static means something that does not move); electricity that moves from one place to another is called current electricity.


STATIC ELECTRICITY

Static electricity often happens when you rub things together.

Now that we know objects can have positive or negative charges let's talk about how objects that are charged will behave. There are 3 main rules about electrical charges:
like charges repel 
external image awayarrw.jpgSo if both you and your friend rubbed balloons on your head and then tried to stick the balloons together they would repel or push away from each other because they would both have the same charge.

Unlike charged objects attract Since your hair has a positive charge and the balloon has a negative charge, they are attracted to each other. Kind of like to magnets trying to stick together.

A charged object will attract an uncharged object So the balloon is charged and the wall has no charge. This means the wall is attracted to the balloon.

EXPERIMENT 1: STATIC ELECTRICITY
external image balloon.jpg

OBJECTIVE:

To understand why electrons flow you need to understand that atoms can lose electrons by rubbing against another material.

PREDICTION:

THE BALLOON WILL ....... (GAIN, LOSE) ELECTRONS AFTER BEING RUBBED AGAISNT YOUR HAIR so YOUR HAIR WILL ATTRACT/REPEAL THE BALLOON.

MATERIALS:

A BALLOON, YOUR HAIR AND YOUR PARNTER'S HAIR.

INSTRUCTIONS:

First, rub your head against a balloon and see what happens when you slowly separate the balloon from your hair.

OBSERVATIONS:

I observed that....

DRAW THE PICTURE WITH THE ELECTRONS AND PROTONS:


PICTURE 1: HAIR AND BALLOON BEFORE RUBBING THE BALLOON.
PICTURE 2: HAIR AND BALLOON AFTER RUBBING THE BALLOON AGAINST THE HAIR.

CONCLUSIONS:


YOUR HAIR IS ATTRACTING/REPEALING THE BALLOON BECAUSE....


Believe it or not, your hair is actually getting some electrons from the balloon. Because your hair has more electrons than protons, we say it is negatively charged.

So, your hair and the balloon will attract/repeal?


But what about the balloon? Well the balloon has more protons than electrons so it is positively charged.






The flowing electrons make electricity, but how can we use it?

You need three things to let you use this electrical current: a circuit or a path for the electrons to move through, a power source, or something that is going to make the electrons move, like a battery or a generator, and something to use the electricity, like a light bulb or a t.v..external image circuit.gif

The power source causes the electrical current that goes through a circuit or a closed path, and the appliance is connected to the circuit so the electrons can move through it and make the appliance work. This is a lot of information electricity. Try this short quiz to see how much ou learned.


ELECTRICITY QUIZ
Explain that stuff

ELECTRICITY CIRCUITS

For an electric current to happen, there must be a circuit. A circuit is a closed path or loop around which an electric current flows. A circuit is usually made by linking electrical components together with pieces of wire cable.


SYMBOLS TO DRAW DIAGRAM CIRCUITS
external image a295d5b4beae8c7c23997e7f0c4c6360180830f1.gif

HOW DO CIRCUITS WORK?
circuits



CIRCUITS AND CONDUCTORS


What is electricity?

ELECTRICITY ONLINE WEBPAGES



MORE ELECTRICITY
Edu Electricity

ELECTROMAGNETISM




Magnetism and electricity


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