Transcript 2009-2010 Science Fair

2009-2010 Science Fair
By
Keegan
Rogers
Big Question

Which food item will produce a larger electrical
current, a potato or a lemon? If I test it both
without and with a dime and a penny inserted in
opposite sides of the item?
Hypothesis

I believe that the lemon which has an
“electrifying” flavor augmented by the coins will
produce the largest electrical current/
Research
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Originally, I wasn’t even going to use coins.
The position of the coins and the multimeter
prods effects the voltage read.
Four potatoes have the ability to power a digital
clock
Likewise four lemons can power a digital clock
as well.
The penny and the dime reacts with the
electricity in the food.
Materials
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Potato
Lemon
2 pennies
2 dimes
Multimeter (with prods included)
Knife
Procedure
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1. lay all materials on a counter in an organized fashion.
2. using knife make small 1 inch incisions on opposite
areas of the potato.
3. insert penny and dime
4. insert multimeter prods on the opposite sides of
potato
5. record observations
6. repeat steps 2-5 on the lemon
7. compare results.
Variables
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My variables were the potato and the lemon and
also the coins that were or were not being
inserted in the food.
Observations
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Potato without coins created .052 volts
Potato with coins created .141 volts
Lemon without coins created .048 volts
Lemon with coins created .028 volts
Data
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Clearly you can see that the potato with coins
did the best and my data is more clearly
illustrated by this graph
Data continued
Voltage in fruits and vegetables
0.16
0.14
0.12
Lemon
0.1
Lemon w ith coins
0.08
Potato w ith coins
0.06
Potato
0.04
0.02
0
Lemon w ith coins
Lemon
1
Potato
Potato w ith coins
Analysis
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Clearly you can see that in comparison with the
others the potato with coins did considerably
better than the rest of the variables.
Conclusion
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In conclusion you can see that the experiment
was a total success and I got reliable results
because I triple checked my work so the potato
with coins was the best electrical producer.
References
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http://www.ushistory.org/franklin/fun/lemon.h
tm
http://www.science-projectsresources.com/how-to-make-a-potatobattery.html