A voltaic battery contains a number of cells joined up and delivering electricity through a device. Referring to the diagram above each cell contains a cathode, an electrode, a bridge between the two, and a device of the right resistance completing the circuit. Here’s a list of the things you will need before making voltaic batteries in Mum’s kitchen (with her permission of course).
The Materials You Need for Making Voltaic Batteries
#1 One plastic ice tray washed out and nice and clean and dry
#2 Five new, shiny galvanized nails say one inch long each
# 3-foot long piece of shiny new, un-insulated copper wire
#4 A small amount of distilled vinegar for the electrolyte
#5 One LED light with wires protruding from the base
Once you have these resources you have what you need for making voltaic batteries. Let’s get started with the first one!
Let’s Do the Experiment: Let’s Make a Voltaic Battery
Wrap the copper wire three times around the first nail up against the head. Leave one end of the wire sticking out three inches. Cut the other end off.
This arrangement will ensure a good contact and sufficient resistance. Next, assemble the other four nails. You now have the electrodes for your battery!
Now fill six wells of the ice tray with vinegar. These must form two rows of three side-by side. These are your six voltaic battery cells.
Next, you need to place each galvanized nail in its own well with the head facing up. Bend the copper wire so it rests in the adjacent cell with the wire tip under the vinegar.
Make sure none of the wires are touching each other. You now have an electron bridge between the cells, except the circuit is still not complete.
Identify the two cells that are still not joined up. These should be next to each other. Create a bridge between them using the two led wires. The circuit is complete. The LED should illuminate.
If it does not light then the polarity is wrong. Rotate the bulb so the wires are in opposite cells. If the LED still does not light there are wires touching somewhere.
You Can Continue With the Process and Make More Batteries
You can continue making voltaic batteries separately until the ice tray is full. When all the LED’s light in the dark, you will see the amazement on your friends’ faces.
Related
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Homopolar Motor Using a Rare Earth Magnet
Preview Image: A Simple Electro-Chemical Cell
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