Can tinfoil and magnets generate electricity? The young man made a perpetual motion machine, which can light a big light bulb after starting.
Rumors:
There is no perpetual motion machine. There is no perpetual motion machine. There is no perpetual motion machine.
Say the important things three times.
Apply some unknown mucilage on the silver "tin foil", connect the wires, lay a layer of paper, put a piece of tin foil, apply mucilage, connect the wires, and then roll them up to be electrified. This device can drive toy motors, LED bulbs and do many other things. Now there are many similar videos on the Internet, some just say "tin foil and magnets can generate electricity", and some even add a gimmick of "perpetual motion machine". In fact, this is a common "oratory", or deception, just to increase the number of clicks on the video.
It looks wonderful, but it's worthless after all: these videos are just a chemical battery. When two different metals are placed in a chemical solution, a chemical battery can be formed to convert chemical energy into electrical energy. Lead-acid batteries often used in daily life are chemical batteries. In this kind of video, "tin foil" and "wire" are different metals, and the smeared mucus plays the role of electrolyte. Together, they form a chemical battery, and then you can drive the toy motor and light the LED bulb.
The magnet may provide a magnetic field to make the coil move with the current, or it may just be an ornament (some toy motors move when energized). The current required to light the LED is very small, and the current required by the toy motor should also be very small. A simple chemical battery is enough. Even if the current is not enough, he can do something, such as changing a dry battery (it is easy to do this in the video now). For ordinary people, living magic can fool people around. I know it's fake, but it's hard to see where he's playing tricks. For all kinds of videos posted online, it is simply too easy to play tricks, and all kinds of clips and PS tools are flying all over the sky. Seeing is believing? Does not exist! Everyone should still believe the physics knowledge learned in middle school, instead of a little video posted by Li Sansi on the Internet that I don't know where it came from.
As for the perpetual motion machine, there is no perpetual motion machine, which is a gimmick to increase the number of clicks. China's nine-year compulsory education and popular science propaganda have made most people know that perpetual motion machine is impossible because it violates the law of conservation of energy. But adding the word "perpetual motion machine" to the title is still very eye-catching. The audience will think: Why are there cheaters (or fools) to promote perpetual motion machines? Watch me expose his lies! Then he clicked on the video and fell into the trap of a liar. Because this liar is directed at the number of clicks, no matter good or bad, just be famous!
For this title party, we must resolutely adopt the "three noes" policy: don't look, don't look back and don't comment. In this way, we can not be fooled and waste time.
Rumor expert: Ji Yang Institute of Semiconductors, Chinese Academy of Sciences
Judging expert: Zhang Chuang, former deputy director of Institute of High Energy Physics, Chinese Academy of Sciences, and director of Science Popularization Committee of Chinese Physics Society.
Producer: Cop China-Scientific Refutation