Make a Battery
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. We are
wondering if we can use any other liquid as electrolyte? This
gave us the idea of using a potato as electrolyte. After all a
fresh potato has a lot of juice that may serve our purpose as
Can Potato be used to generate
Potato juice contains many
water soluble chemicals that may cause a chemical reaction with
one or both of our electrodes. So we may get some electricity
For this experiment we
- A fresh potato
- Copper Electrode
- Zinc Electrode
- A Digital or Analog
Multimeter to measure Voltage or Current of produced
- Alligator clips/
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 it's Positive and Negative
wires to each other that should show no current and no voltage).
multimeter showed 1.2 volts between the electrodes, but
the analog multimeter showed a much smaller value. In
other words even though the voltage between electrodes
is 1.2 Volts, the speed of production of electricity is
not high enough for an analog multimeter to show the
exact voltage. (Analog multimeter gets it's power from
our potato to show the voltage, but digital Multimeter
gets it's power from an internal battery and does not
consume any of the electricity produced by our potato,
that is why it shows a larger and more accurate value).
We repeated this experiment with some other fruits and
all resulted almost the same. In all cases the produced
voltage is between 1 and 1.5 volts, and in all cases
they do not produce enough current to turn on a small
thing that we learned from this experiment is that
creating electricity and making a battery is easy, the
main challenge is producing a battery that can continue
to produce larger amount of electricity for larger
amount of time.
Multimeter does NOT need battery in order to
test voltage and current. You will need a
battery to test the resistance.
electricity science kit contains all
material that you need in order to
successfully experiment making
electricity by a chemical reaction. Some
chemicals are harmful and dangerous!
that's why we recommend you to use
household chemicals such as acetic acid
(Vinegar), baking soda, fruits and fruit
kit contains small and sharp objects.
keep it out of reach of small children.
Adult supervision is required.
purpose of this science kit is to
simplify the process of finding and
purchasing material that you need for
Copper and Zinc
Multi tester or
Color Coded Leads
Miniature Bulb 1.2V
If any of the parts in this kit are
defective, return it to us within 7 days
from the date of purchase and we will
repair or replace it for you at no