How are electricity produced when two different metals are put in fruit?

When two different metals are inserted into a fruit, a chemical reaction occurs between the metals and the acids in the fruit, creating a flow of electrons. This process generates a small amount of electricity due to the difference in electrochemical potential between the two metals. The fruit acts as an electrolyte, facilitating the movement of ions, which completes the circuit and allows for the production of electric current. This principle is often demonstrated in simple experiments with fruits like lemons or potatoes.