Electronics Tech, Lime Battery

We wanted to see how a battery worked so we put a zinc nail and a piece of copper into a lime and connected it to a volt meter.
One line equaled 0.95 volts, two lines equaled 1.96 and three lines equaled 2.8 volts. Those volts lit up one LED.

• Does it depend on the size of the lime? No.
• What if I put more nails and copper in? Yes you can.
• Can I use different metals? Yes
• https://www.youtube.com/watch?v=GhbuhT1GDpI This is a link to a short youtube clip about a lemon experiment that answers probably all the questions that I had about electricity.

The next day, tech group 10a repeated the experiment, this time using a banana. The voltmetre told us that a banana has a higher voltage than a lime. Bananas have a voltage of 1.0 while limes have a voltage of 0.95.

Here is a photograph of our banana experiment.