1. Sources of Electrical Energy Small Scale
Lesson 5
Sources of Electrical Energy Small Scale

2. Small Scale Sources of Electrical Energy
Electrical Energy could almost be could almost be called the “in between” form of energy. First other forms of energy are converted into electrical energy in power generation stations, and then it is converted to other forms of energy for a variety of uses.

3. Electrical energy does have its uses though; its clean, can be transmitted long distances, and is safe to use if precautions are taken.
The biggest advantage of electrical energy is that it can be produced from all other forms of energy and then converted back into any other form except for nuclear and fossil fuels.

4. Producing Electrical Energy Directly from other Forms of Energy
There are 5 basic forms of energy that can be used to produce electrical energy directly from the source of energy
Mechanical
Thermal
Sound
Radiant
Chemical

5. 1. Mechanical energy
Mechanical energy can be directly converted into electrical energy.
Piezoelectric crystals can produce small amounts of energy when they are squeezed or stretched.

6. 1. Mechanical energy
These crystals are used in watches, microphones and some BBQ lighters. Geophones can also convert vibration into electrical energy.

7. 1. Mechanical energy

8. 2. Thermal Energy
Thermal energy can be converted into electrical energy using a device called a thermocouple.

9. 2. Thermal Energy
The thermoelectric effect occurs when two different metals are joined together at the ends, and the junction of the metals is heated. They are also used to measure high temperatures.

10. 2. Thermal Energy

11. 3. Sound Energy
Every time you use the telephone you are producing electrical energy as you speak into the mouthpiece.
Sound can be converted into electrical energy by using piezoelectric crystals or by moving magnets and electromagnets.

12. 3. Sound Energy

13. 4. Radiant Energy
Solar cells convert light energy directly into electricity when light strikes the surface of silicon, electrons are released and produce an electric current.

14. 4. Radiant Energy
Not only are solar cells used to generate electricity they also have practical applications in technology such as barcode readers, automatic doors and lights sensors, and in CD and DVD players.

15. 5. Chemical Energy
A very common source of electrical energy from a chemical reaction is the voltaic cell.

16. 5. Chemical Energy
There are several different types of chemical energy which will be expanded upon in a later lesson.

17. Who can make the Most Electricity?
Another source of electrical energy is by moving magnets. Based on what you have learned about electromagnets, you will create a generator that will create electricity by using a few simple materials.

18. The goal is to create the most amount of voltage you can
The goal is to create the most amount of voltage you can. The voltage will be measured using a volt meter.
You can modify your design by using different magnets, method of coiling wire and speed of moving magnets.