Friday, December 2, 2011
David's Green Science
Warning: The apples should not be eaten after they are used in this type of battery. They will contain zinc, which is toxic.
How does it work? The zinc ions and copper ions are separated by the apple. Otherwise they would interact with each other and produce a little bit of heat. The electron transfer takes place over the copper wire, which powers our clock. Chemical energy is converted into electric energy by electron transfer. The electricity produced is not much (definitely not enough for a person to feel), but clocks need very little energy to run and this makes them ideal for this project.