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To test which combinations of metals will produce the highest voltage in a fruit battery.

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Introduction

An Experiment to test which combinations of metals will produce the highest voltage in a variety of fruits to make a fruit battery Aim: To test which combinations of metals will produce the highest voltage in a fruit battery. Prediction: Safety: There is always a concern when using electricity and acids about the safety. Therefore I think it will be important to perhaps use gloves and goggles. Also, the experiment will be conducted whilst standing. Apparatus: * Two 8 cm long strips each of magnesium ribbon, zinc foil, lead foil, copper foil and iron foil. * A lemon, apple, potato and grapefruit, each with two holes cut in the top, 2 cm apart. ...read more.

Middle

* The voltage produced was observed on the digital voltmeter and recorded in a table. * This process was repeated until the four fruits had been tested. Diagram: Results: * Pb - lead * Cu - copper * Mg - magnesium * Zn - zinc * Fe - iron Lemon Pb Cu Mg Zn Fe Pb 0 0.45 1.32 0.49 0.10 Cu 0 1.53 0.92 0.44 Mg 0 0.65 1.43 Zn 0 0.45 Fe 0 Apple Pb Cu Mg Zn Fe Pb 0 0.43 1.01 0.54 0.06 Cu 0 1.54 0.89 0.41 Mg 0 0.55 1.12 Zn 0 0.50 Fe 0 Grapefruit Pb Cu Mg Zn Fe Pb 0 0.42 1.26 0.49 0.03 Cu 0 1.66 0.91 0.45 Mg 0 0.71 1.14 Zn 0 0.46 ...read more.

Conclusion

Fruits are also very unpredictable and vary. I think that we should have perhaps focused on one fruit, like the lemon, and used three different lemons to increase accuracy. This would perhaps be a more useful approach. I believe further investigations are needed to help fulfill the aim of the experiment. I think that acids and alkaline solutions should be used instead of fruits due to their unreliability. This will make the experiment quicker too. The outcome would be more predictable. The distance between the two metals in the fruit could be varied in further work to again test the voltages produced using different combinations of magnesium, iron, zinc, lead and copper. Other variables to be tested are the surface area of the metals and how that would affect the voltage produced, and also to oxidise or deoxidise. ...read more.

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