Question

How can we light a bulb with a potato?

Answer 1

The chemical reactions that take place between two dissimilar metals and the juices in the potato create a small amount of voltage that can power a very small electrical device. Follow the instructions below to make a potato-powered light bulb:
Materials required:
A large potato
Two pennies
Two zinc-plated nails
Three pieces of copper wire
A very small light bulb or LED light
Steps:
1. Cut the potato in half. Further, cut a small slit in each half, large enough to slide a penny inside.
2. Wrap some copper wire around each penny a few times. Use a different piece of wire for each penny.
3. Stick the pennies in the slits.
4. Wrap some copper wire around one of the zinc-plated nails and stick the nail into one of the potato halves.
5. Take the wire connected to the penny in the half of potato with the nail and wrap some of it around the second nail. Stick that second nail into the other potato half.
6. When you connect the two loose ends of the copper wires to the light bulb or LED, it will light up.