مساعدة

بحث الانجليزية حول تجربة علمية بسيطة

Make a Battery from Potato

Introduction:

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 electrolyte.

Problem:

Can Potato be used to generate electricity?

Hypothesis:

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 from that.


Material:

For this experiment we use:
A fresh potato
Copper Electrode
Zinc Electrode
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 ****l 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:

A digital 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 its power from our
potato to show the voltage, but digital Multimeter gets its 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 light.
Another 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. By connecting multiple potato
batteries you can make enough electricity to light-up a super bright
light emitting diode (Included in the kit).

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