The sciencebuddies article (http://www.sciencebuddies.org/science-f ... p029.shtml
) mentions potatoes, citrus fruits and onions. It encourages experimentation with other fruits and vegetables.
Elsewhere, lots of fruits and vegetables are discussed, but none yet for pineapple. I encourage you to run a pineapple experiment, and let us all know if a pineapple battery works.
Here are some additional resources:
lemonhttp://pbskids.org/zoom/activities/sci/ ... ttery.html
apple, lemons, tomatoes, onion,, potatoeshttp://wiki.answers.com/Q/What_fruit_or ... ve_battery
lemons, oranges, potatoes, carrotshttp://www.finishing.com/262/03.shtml
what other fruits can make a ’lemon battery’?http://van.physics.illinois.edu/qa/listing.php?id=2404
discusses why and how electricity is generated by fruits and vegetables
“As for what foods can be used, almost any fruit or vegetable should work,” discusses some, but doesn’t discuss pineapple.
pineapplehttp://wiki.answers.com/Q/Can_a_pineapp ... ve_battery
contain "This question has not been answered yet."
So, when you run a pineapple experiment, you could answer the question!