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Fruit Battery
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FRUIT BATTERY (Abstract)
By Nivedita Kripalani 22-Feb-2016
My project is called the “fruit battery” because fruits can generate electricity. I wanted to
do this project because I always wondered if electricity could be generated in things that are
different from batteries. My question asks, “What types of fruits conduct electricity?” I guessed
that if a fruit is more citric, then it will conduct more electricity than a fruit that is less citric.
The electric current is the flow of electrons through a conducting wire. The current has a unit of
measurement called amperes. An electrode is a conductor that carries an electric charge. To
conduct an electric current, you need a positive and negative electrode. An LED converts
electricity into light. With a fruit, I can create a closed circuit with a positive and a negative
electrode and generate electricity using the citric acid in the fruit.
I used four fruits and created four closed circuits using positive and negative electrodes
(zinc and copper). I connected the LED light and the multi-meter into this closed circuit and
recorded the current, and how long the LED light stayed on for each fruit. I repeated this
procedure for four fruits, two times each. Then I recorded this data in a table and presented my
results.
As my initial hypothesis stated, the fruits that are more citric generated a higher reading
on the multi-meter and enabled the LED light to stay lit up for a longer time. The acidic fruits
such as the lemon and orange generated more electricity than the apple or the pear which are less
acidic fruits. I concluded that the citric acid in the fruit is a good conductor of electricity because
of the specific characteristics of this acid.