英文版水果电池实验PPT.ppt

Author: Kang Jack Materials needed 1.Oranges、Apples 2.LED 3.Alligator clips and leads 4.Multi-meter 5.Metal electrodes 6.Display board Ⅰ、 Presentation The organic battery is a chemical reaction, it needs three conditions. 1. Electrode materials are made of two different metal. 2. Electrode must be in Electrolyte 3. Electrode should be linked with wire Ⅱ、Documentation Fruit electrode Depth(mm) electrode distance(mm) Voltage(V) Amps(mA) apple Cu Zn 10 10 0.67 0.081 15 0.55 0.064 20 0.48 0.056 25 0.42 0.046 15 10 0.73 0.122 15 0.62 0.074 50 0.56 0.070 25 0.51 0.060 Fruit electrode Depth(mm) Electrode distance(mm) Voltage(v) Amps(mA) orange Cu Zn 10 10 0.52 0.102 15 0.46 0.081 20 0.44 0.072 25 0.43 0.066 15 10 0.57 0.121 15 0.53 0.110 20 0.52 0.081 25 0.50 0.079 Ⅲ、Critical Analysis The voltage have something with the depth of insertion 、Electrode distance and the kinds of fruits. 1.The organic battery of apple is better than orange. 2.The more depth , the bigger voltage and amps . 3.The more far Electrode distance , the smaller voltage and amps Ⅳ、Research questions 1.What is the best fruit or vegetable? why? Apple, because the more low PH, the more high Voltage. 2.how long the LED work for? About one hour. 3.changing the electrode distance? What happened? With the electrode distance became far, Voltage was small. 4.why do placing two dissimilar metals into a fruit produce an electric current? Because the dissimilar metals have different metal activity, it can realize the chemical reaction. however, the similar metals have no the function.