“Juice” is a slang term sometimes used for electricity. It comes from the fact that electrochemical batteries are formed when two conducting materials are immersed in an acidic solution. When the conducting materials are connected by a wire, electric current will flow. In this activity, you will study some basic principles of electrochemical batteries using the juice of a lemon as the battery solution, called the electrolyte. Small strips of conducting materials will be inserted into the lemon to act as electrodes. The acid in the lemon juice helps break down the atomic structure of the conducting materials causing individual electrons to be released. You will use a Differential Voltage probe to measure the voltage produced.
In this experiment, you will
Build a lemon battery.
Use a Voltage Probe and NXT to measure and display cell voltages.
Discover which materials produce a voltage.
Decide which materials make the "best" battery.
Sensors and Equipment
This project/activity requires each of the following Vernier sensors and equipment (unless otherwise noted):