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把电线往大树上一插,路灯就亮了,这是真的。马铃薯、锌片、铜片、一根导线,连起来可得到电流0.3毫安。用同样的方法测橘子得到电流0.7毫安,西红柿则有1毫安。那么大树呢?华盛顿大学的电气工程师巴巴克·帕维兹实地测量之后发现——它足以取代路灯。首选枫树发电一棵树能产生平均200多毫伏,也就是约0.2伏的电压。麻省理工学院有人做过这个研究,将电极的一头接在一棵树中,另一头接在这棵树附近的土壤
It is true that the electric light is plugged into the tree and the street light is on. Potato, zinc, copper, a wire, connected to get the current 0.3 mA. Using the same method to measure the orange current 0.7 mA, tomatoes have 1 mA. What about a big tree? After field measurements at the University of Washington electrical engineer Babcake Pavitz - it’s enough to replace streetlights. The first choice of maples to generate electricity from a tree produces an average of more than 200 millivolts, or about 0.2 volts. Someone at Massachusetts Institute of Technology did this research, connecting one end of a pole to a tree and the other to the soil near the tree