If you thought that potatoes were only good for eating than you are wrong . Potatoes can also be used as low voltage battey and to prove this i will teach you to light a low voltage bulb with a potato battery .
Things you need : 2 potatoes (obviously) , glavanized zinc nails , copper wire , low voltage bulb
step 1 : Insert the galvanized nail to the ends of each potato .
step 2: Insert the copper wire to the other end of the patato keeping it as far as possible from the nail
step 3: Join the copper wire from the first potato to the nail in second potato so that we have a connection in series
step 4: connect (any device) the bulb to the terminals (the copper terminal act as positive and the zinc act as negative)
The chemistry behind this is simple . The potatoes contain phospheric acid whis allows the electrons to flow from copper to zinc . This means that if you would use fruit like lemons or oranges instead of potatoe the battery would still work . A single potato produces about 0.5 volt of current .
Try experimenting with other low voltage devices or by adding more potatoes for more power
Do not eat the potatoes after using them for batteries .
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