Do you have any ideas for a cheap electricity science fair project?

Question

If you do please tell what materials i need and how to make it.

Answer 1

Try this site. www.sciencetoymaker.org/

Then there is always this.



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 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).

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 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 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.

Answer 2

To be honest with you, I don't know much about this, but research the Tesla coil. I have heard that the materials include a battery and a potato, so the cost is looking pretty good from this angle.

Answer 3

Charcoal making with the ingredients of paper and different waste ingredients. of coarse different than plastic and rubber.. Ist step: Soak paper interior the water. 2nd step: positioned it in a field to which you will style the soak paper. third step: enable it dry. and in a position to apply. it incredibly is convinient than employing charcoal that made in trees..