Devices that converts other energy to Electrical energy and Different kinds of Circuits

Have you ever used or seen batteries ?
If not , you need to live life more dude .

There are devices that produce electricity .
and these are called ..

Cells . [ not human cells ok ? ]
Cells are devices that  produce electrical current by converting chemical or radiant energy into Electrical energy.

Have you ever heard of Thermocouples ?

then dude , nice to see a science geek in my page .

Thermocouples are devices that convert thermal energy into electrical energy .

Now have you seen or heard of houses that are solar powered , 

Do you know how they "solar-powered " their houses ?

It's because of the solar panels right ? usually these things are attached to their roof, well these panels is just an example of :

Photocells , these Photocells are devices that converts light energy into electrical energy.

Now why are these changes possible ? 

first and for most do you remember ,my previous blog about " The Law of Conservation of Energy " ? 

That no energy is lost but just changed into another one . 

In the same time Electrical energy can also be converted into different forms of energy . 

the rate at which this energy is converted into another is called Electric Power .

Circuits 

Have you observed the lights in your house ?

If you turn the switch on how many lights usually turns on ? 

well , this depends on what kind of circuit you house has .

Have you ever wondered when your mother plugged your christmas tree lights on , all of the lights flicker together at once ..?
That's because Christmas lights are in the so-called Series Circuits '
Series circuits are circuits in which all parts are joined in a single loop , therefore of you turn the switch on all the lights will turn on .

the other kind of circuit is the Parallel Circuit
Parallel circuit is a circuit in which the parts are joined in branches such that the potential difference across each part is the same .



Well then this is the end of the blog for this week ,
just remember ...


Science is beautiful ,
Laziness to learn it is Ugly .


So what do you wanna be ?
Beautiful ? OR Ugly ?

Your choice ! farewell for now Amigos and Amigas !

Voltage , Resistance and current

Now, this topic is about Voltage , Resistance , current and how these three are connected .

First at the bus stop is the meaning of each .

What is Voltage ?  ( V )

Voltage is the potential difference between two points . The unit of measure of this is Volts

It is how high and how many electricity a body contains to be able to produce a specific amount of force ,

WHICH GREATLY AFFECTS THE : 

Electric current ( I )

Electric current is the rate at which charges pass a given point . The unit of measure given for the current is Amperes .

Now to slow down the current that would eventually stop it , is the : 

Resistance ( R )

by it's root word "resist" , resistance usually means the opposition presented to the current by a material or device .

This means that if the Voltage is increases the current also increases ,

If the Resistance increases then the current decreases . 

Now how do we Calculate the voltage , and the Resistance ?

AS we can see in the triangle :

V= Voltage ; I = current and R= Resistance

therefore : Voltage is equal to Resistance times Amperes ( current ) 

or , V=  I x R , Voltage is directly proportional to the current ( both increases )

therefore : Resistance is inversely proportional to the current ( if R increases , I  decreases )

R= V divided by I [ R= V/ I ] 

- End of Topic -

The charges and Static electricity

Many of you might have asked your mom when you were younger as to how the bulbs in your room light up , and she may have said " oh baby , it's because of the gravity of the earth " , or my mother used to tell me that because I was such a cute little nagger , and now that I'm older and learning [ eventually ] I finally knew how it did the magic , let me tell you a little hint . 

We all know that Atoms have charges [ right ? pretty basic though ], the so called "positive" and " negative charge " and of course , my personal favorite " no charge" [ my favorite because lesser lesson has been discussed for this charge ] 

You see, Charge is a physical property, all object on earth have charges , [ your sweater and other stuff ] It can either have a positive, negative or no charge [by the way "no charge " is still considered a kind of a charge ] Charged object exert a force , and this force you can usually see around the doors of a grocery store or somewhere where there's doors - the so called push or pull .
The Law of Electric Charges states that like or the same charges repel or push away while opposite of different charges attract or pull towards the other charge.
Now if you push or pull a door usually the strength can be measured right ? , well for charges who repel or attract there is also force exerted which is called Electric force , so to wrap up , Electric force is the force of attraction or repulsion on a charged particle that is due to the space around a charged object in which another charged object experiences the force , which we call the Electric field , so to wrap more things up , Electric force is the force exerted by the charged particle , and Electric field is the space around the charged object . 


Now how can an object become a charged particle ? 
Well darling , it can be charged by :


1) Friction - happens when electrons are being transferred from one object to the other through physical contact on the surfaces.
2) Conduction - happens when electrons move from one object to the other object by direct contact.
3) Induction - happens when chaqrges in an uncharged metal object are rearranged without direct contact with a charged object.


What device can detect a charge ?

You can use a device called Electroscope to see if something is charged. 
An electroscope is a glass flask that has a metal rod in its rubber stopper. Two metal leaves are attached to the bottom of the rod. When the electroscope is not charged, the leaves hang straight down. When the electroscope is charged [ the leaves grow. Joke ] , the leaves repel each other , or spread apart . 


What are conductors ? 
An electrical conductor is a material where charges can flow or move easily . 
Examples of which are Copper , Aluminum , and mercury . 

What are insulators ?
An electrical Insulator is a material where charges cannot flow or move easily. These usually protect you from electrical shocks.
Examples are Plastic , rubber, glass, wood, and air that you and I breathe are good insulators .

Now we've been mentioning a lot about electricity ,
Let's talk about Static electricity [ well that's not about your favorite band the Fm Static but I guess they also know about the concept of the static things that inspired them to name the band that way , but anyhow it's time you learn about it too ]


Static Electricity is the electric charge that is at rest . When we say "static" it means "not moving" 
Try to rub your shoe against the carpetted floor , and after sometime touch a metal, once you get electrecuted, that's Static Electricity at work. 

- End of topic -