SC4_I2

Transformers & Circuits : 

Transformers & Circuits

Transformers: 

Transformers A transformer is an electrical device that takes electricity of one voltage and changes it into another voltage . Electricity from power plants is a very high voltage to be able to travel long distances. The high voltage lines can be as high 155,000 to 765,000 volts to travel many hundreds of miles. Home = 220-240 volts

PowerPoint Presentation: 

Transformers manipulates two properties of electricity Current + Wire = Magnet + Wire = Two different coils of wire around opposite sides of an iron core. If you change the number of turns of the wire from one side to the other, you change the voltage. Magnetic Field Current Iron Core Many Coils Fewer Coils What are you doing to the voltage?

What would a step up transformer look like?: 

What would a step up transformer look like? Iron core Primary Coil Secondary Coil Whiteboards

Circuits: 

Circuits Series circuit: circuit in which resistors (like light bulbs) are arranged in a chain, so the current has only one path to take. Parallel circuit: A parallel circuit is a circuit in which the resistors are arranged with their heads connected together, and their tails connected together. The current in a parallel circuit breaks up, with some flowing along each parallel branch and re-combining when the branches meet again.

We have been looking at the forms & sources of energy!: 

We have been looking at the forms & sources of energy! Lets take a closer look at these percentages

Complete “Forms & Sources of Energy”: 

Complete “Forms & Sources of Energy” A renewable resource is something that is being continually replaced faster than we use it up. A non-renewable resource is something that is not being replaced as we consume it.

Forms & Sources of Energy: 

Forms & Sources of Energy 91.9% 8.1%

Well if it is going to run out soon at least we use what we have efficiently! : 

Well if it is going to run out soon at least we use what we have efficiently! How much useful energy can you get out of a system? If a machine was 100% energy efficient it would change all of the energy put into it into useful work. Most energy transformations are not very efficient The Human body is like a machine (Fuel = “food”) Food gives us energy to move, breathe and think. How efficient is your body? Your body is15% efficient at using energy the rest is… Lost, typically as heat

How efficient are Power Plants?: 

How efficient are Power Plants? 35 % efficient It takes 3 units of energy to make one unit of electricity Most is lost as heat (thermal energy)

Your energy use!: 

Your energy use! Every day, the average American uses about as much energy as is stored in _____________ of gasoline. That’s every person, every day. Over a course of one year, the sum of this energy is equal to about 2,500 gallons of gasoline per person. This use of energy is called energy consumption. Seven gallons

To sum up!: 

To sum up! Most of the fuel that we use to make energy is from Nonrenewable Resources…. The ways that we use these nonrenewable resources to make electricity is not very efficient… We use a lot of energy on a daily basis… ….so where does this leave us?

41 min: 

41 min A Crude Awaking