Why doesn't this potato battery work?
May 18, 2010 6:23 PM Subscribe
Why isn't my son's science fair project working? His classic potato battery isn't producing any electricity.
posted by LarryC to Technology (24 answers total) 6 users marked this as a favorite
So my 10-year-old wants to make some batteries
with different kinds of fruit and veggies for the 4th grade science fair. He sanded a penny to make it bright, inserted the penny and a galvanized nail into the potato, and -- nothing. Same with a lemon. We definitely are using galvanized nails, the penny and the nail are not touching, the multimeter is working fine, so why is this not working? Please help us Mr. Wizard!