A Comparative Study of Fruit Battery Voltages with Different Types of Fruits using Different Electrode Combinations

Abstract

The objective of the present research on fruit batteries was to compare the voltage produced by different fruits with different electrode combinations, keeping the cathode material unchanged (copper). The electrode pairs selected for the purpose are copper-iron (Cu-Fe), copper-zinc (Cu-Zn) and copper-aluminium (Cu-Al). The fruit acted as an electrolytic medium providing continuity to complete the electrical circuit. The potential differences created by each electrode pair were measured using a multimeter. From the results obtained, it was evident that the different fruits produced different voltages. The nature of the fruit is an indisputable criterion which decides the fruit battery voltage .The most important and relevant observation was that there was an increase in the voltage with increase in reactivity (oxidizing tendency) of the anode material. This observation was found to be true for all fruit batteries which were subjected to investigation and the result obtained could easily be explained based upon the positions of electrode materials in the activity series or electrochemical series.