for Dry Cell
A Science Investigatory Project
Submitted to Mrs. Luzviminda M. Bago
As a Requirement in the
TOLEDO, JAYCEE N.
GARCES, DOROTHY ANNE D.
FALLEJO, JOBELLE ROSE A.
Dasmariñas National High School
Special Science Class
S.Y. 2012- 2013
The study entitled “The Utilization of Kamias (Averrhoa bilimbi), Lemon (Citrus limonium), Lime (Cituse auretifolea) and Calamansi (Citrofortunella microcarpa) Extract as an Alternative Component for Dry Cell” conducted by Jaycee Toledo, Dorothy Anne Garces and Jobelle Fallejo, aimed to produce more electricity in a battery out of commonly available raw materials found in the community which are eco-friendly. Ten (10) pieces of Calamansi, 10 pieces of Kamias, 1 piece of medium size of Lemon and 1 piece of medium size of lime was extracted by means of squeezing, to produce 50ml extract. The cotton was dipped in the extract and was placed in the middle of the 5cm long graphite, which was taken from Monggol no.2 pencils and was inserted on a tube made of tin can measuring the size of a double A battery. Then, 1.7 cm in diameter of Copper and Zinc plates was placed inside the tube together with the dipped cotton . This is the treatment 1. On a tube made of tin can as the same measurement as in treatment 1, 1 piece of medium size of Lemon 1 piece of medium size of lime 10 pieces of Kamias and 10 pieces of Calamansi, was extracted by means of squeezing, to produce 50ml extract then add 10 gms of baking soda. The cotton was dipped in the extract and was placed in the middle of the 5cm long graphite, which was taken from Monggol no.2 pencils and was inserted on a tube made of tin can measuring the size of a double A battery. Then, 1.7 cm in diameter of Copper and Zinc plates was placed inside the tube together with the dipped cotton . This is the treatment 2. Using a voltmeter, voltage rating and resistance of both batteries were recorded, they were also tested on the following materials: LED lights, scientific calculator and digital clock, which showed positive results.
Treatment 1 got a mean of 4.03 volts and Treatment 2 got a mean of .5 volts .In terms of resistance treatment 1 got a mean of 132.23 while treatment 2 got a mean of 94.3. The computed weighted mean was subjected to t-test and resulted to a computed t-value which is 3.268, that is greater than the critical value at 0.05 level of significance which is 2.132. This means that there is a significant difference in terms of voltage rating. The researchers conclude that, citrus fruits such as Kamias, Lemon, Lime and Calamansi can also be an alternative component in making dry cell. energy.
However, they also suggested to improve the packaging of the product to produce higher voltage and resistance using more extracts and soil and to test them on toys.
The researchers would like to acknowledge those people who made this research project possible that gave their all out support and guidance and who have inspired us, who in one way show their support in the fulfillment of this research project. First of all, we would like to thank our dearest coach, Mrs. Luzviminda Bago who spare her time and knowledge, and ideas on the improvement, revision, and completion of this present study. To the researchers’ family, Toledo family, Garces family and Fallejo family, who gave us inspiration and wisdom in performing this project. They gave their all out support in terms of financial, moral, intellectual and spiritual aspects. We would also like to acknowledge the presence of our classmates, friends, and social groups that has been on our sides and making us happy. For the guidance and opinions of Mr. Antonio Petillos, Mr. Abuejella, Mrs. Bihasa, Sir Seña,...