Investigatory Proposal: Organic Batteries VS Commercial Batteries (7-Rizal Grp.5 2009-2010) I. Introduction
A. Background of the Study
In the 21st century, billions of people rely on electrical energy in one form or another. Today, even in some of the most remote regions, electricity powers lights, radios, televisions, and many other devices that help people to be more productive, comfortable, and informed.
In some places, electricity is generated by hydro-electric dams or coal-fired power plants. In others it comes from self-contained units called "dry cells," also known as batteries. Regardless of its source, the result is the same -- the flow of electrons through a substance.
In order for electrical current to flow, three conditions must be met. One is presence of a substance that allows electrons to move, or flow, easily through it. Such substances, called conductors, are made up of atoms that hold their electrons loosely, allowing them to flow freely to other nearby atoms.
The second requirement is the presence of a power source. Whatever its form, a source of electrical current creates what is called a voltage difference, which pushes electrons through the circuit. The chemical reactions inside batteries produce voltage differences between one end of the cell and the other that result in electrical current.
Lastly, electrical current requires a closed circuit, a length of conducting material connected at each end to a power source that also passes through the "load," the object that makes use of the current. A closed circuit allows a direct, uninterrupted flow of electrons out from the power source and back again in a complete circular connection with no beginning or end.
Our group has proposed this study to see if lemon/orange/potato would be a suitable dry cell to use for daily routines.
B. Statement of the Problem
• Which of the organic batteries can best emulate the quality of an AAA battery? Is it the cheapest of the following?
C. Significance of the Study
The aim of the experiment is to determine if organic batteries are suitable substitutes for dry cell batteries. It is the experiment's intention to explore possible alternative sources for power, given the high cost of commercial batteries (expensive Energizer batteries!) and increasing emphasis on environment-friendly options. That way, we might find better alternative sources of power for the benefit of all.
D. Scope & Limitation of the Study
This project aims to determine the capacity of lemon/orange/potato batteries and see if it can emulate the high quality commercial AAA batteries. Our group is also fully aware of the limitations those batteries provide (such as the low energy it provides). Nevertheless, we hope to acquire our desired results with the available materials and the research we covered such as the chemical components of those materials that allow it to conduct electricity. Hopefully, these organic batteries can compete against commercial batteries. E. Hypothesis
We believe that lemons can best emulate the AAA battery as its high acidity would provide the most power. It is also cheapest as I found 4 lemons for only 20.10 pesos (Smallish lemons, but it’s the size we’ll need anyway) compared to the 28.63 peso Eveready batteries, 17 peso oranges, and 12 peso potatoes at the market.
F. Definition of Terms
To do this project, you should do research that enables you to understand the following terms and concepts: 1. Voltage- electric potential
2. Current- rate of flow
3. Resistance- opposition to the passage of a steady electric current 4. Power- combination of the 3 terms above
5. Electric potential – the capacity to empower the whole circuit 6. Parallel and serial connections of power sources (batteries) and loads (resistors)- proper safety and connections 7. Ohm's law- states that the current through a conductor between two points is directly proportional to the potential difference or voltage...
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