write an expremental setup to test an electrical conductivity of potato
Answers
In this project, you'll be using the natural chemicals inside a potato to light a light bulb. By completing this project, you'll learn about chemical reactions inside batteries and ways to create natural sources of electricity.
Introduction
Goal: To light a light bulb using a potato
Age: Middle school and up
Safety concerns: We will use a knife to cut the potatoes. Use caution and have an adult help you.
Time: 1 hour
Right now you're probably using your laptop or phone to learn about this chemistry project. Both of these devices can work without be plugged in because they are equipped with batteries. Batteries are chemical cells that convert chemical energy into electrical energy. If you need a refresher on how batteries work, check out this lesson on battery basics: How Does a Battery Work? - Lesson for Kids
Although we usually think of batteries as being made of metal, today we're going to see if we can use the chemical energy in potatoes, a vegetable, to power a light bulb. Before you start, think about what's inside the potato that might help light the light bulb.
Materials
2 large russett potatoes
Two 2'' pieces of thick copper wire
Three 4'' pieces of thin copper wire
Two galvanized nails (nails covered in zinc)
6 alligator clips
Small knife
1.5 volt light bulb
Steps
Safety Tip!! Use caution when handling the knife and get an adult to help you if needed.
First, make two slits about 1'' deep on each end of each potato.
Next, insert the thick copper wire into one slit and the nail into the other slit. Do this for both potatoes.
Connect the alligator clips to each end of the three pieces of thin copper wire.
Connect one alligator clip on the first piece of wire to the heavy copper wire in the first potato, and attach the other clip to one end of the light bulb.
Then, attach one alligator clip on the second piece of wire to the other end of the light bulb, and attach the other clip to the nail on the second potato.
Finally, attach one alligator clip on the last piece of wire to the thick copper wire on the second potato, and attach the other clip to the nail on the first potato.
Observe what happens to the light bulb.
Experiment setup
setup
Troubleshooting
Make sure all your wires are securely connected to the alligator clips and then to the metal. If the circuit isn't tightly wired, the electricity can escape. The metal in the potatoes must be copper and a nail covered in zinc. A steel nail will not work and other wire won't conduct electricity as well.
Discussion Questions
What happened when you completed the circuit?
What do you think would happen if we added more potatoes to the circuit?
How It Works
Before we explain how the potato acts as a battery, let's go over the parts of a regular battery you might find in your television remote. Batteries are made of three main parts: an anode, a cathode and an electrolyte.
Parts of a battery
battery diagram
Answer: Potato act as electrolyte and generate electrical conductivity.
Explanation:
Electrical conductivity or electricity can be generated using two electrodes and an electrolyte that produces chemical recation. Electrical conductivity of potato can be evaluated with the help of two electrodes (copper and zinc) and an electrolyte (sulfuric acid).
In potato experiment, liquid potato act as electrolyte and two electrodes are used through which electricital conductivity generated.
The experiment can be done by following below mentioned steps:
- Take copper and zinc electrodes and insert it into potato. th etwo electrodes should be placed a little close to each other but not touching each other.
- Connect both the electrodes with lead at one end and other end to a to the multimeter. multimeter will be further connected to a LED.
- While switching on the multimeter the potato will generate some volate at multimeter and the LED light connected will glow.
Hence, the experiment shows the electrical conductivity of potato.
Learn more about electrical conductivity:
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