Download File - Joanna Weremijewicz

Introduction:
Batteries are devices that store chemical energy and convert it to
electrical energy. Consisting of one or more voltaic cells, batteries
come in various sizes and forms and are integrated into most
electronic and portable devices.
Electrical current is the flow of electrons (movement) of an electrical
charge and is measured using an ammeter. Solid conductive metals
contain large population of free electrons, which are bound to the metal lattice and move
around randomly due to thermal energy. When two terminals of a voltage source (battery) are
connected via a metal wire, the free electrons of the conductor drift toward the positive
terminal, making them the electrical current carrier within the conductor.
Batteries generate electricity through a chemical reaction between two different electrodes
and one electrolyte. Use of Copper and Zinc electrodes and Sulfuric acid as electrolyte is a
proven method for this process.
Problem:
Will a lemon, lime, or potato generate more electricity?
Hypothesis: Write your hypothesis below.
Material:
For this experiment we use:
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A fresh potato
A fresh lemon
A fresh lime
Copper nail
Zinc nail
A Digital or Analog Multimeter to
measure Voltage or Current of
produced electricity.
Alligator clips/ Leads
Procedure:
We insert copper and zinc electrodes in to the potato, close but not touching each other. We
use Clip leads to connect our electrodes to the Multimeter to
measure voltage between two electrodes or current passing
through the multimeter. For this experiment we removed the
shell of a broken AA battery for our Zinc electrode. (Make sure
to test your multimeter by connecting its Positive and Negative
wires to each other that should show no current and no
voltage).
Record And Analyze Data
Fruit
Potato
Lemon
Lime
Conclusions:
Questions:
Volts