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如果你手头上有一架手摇旧电话机(磁石电话机),可以用它来做一些物理小实验,因为它里面装有一个小手摇发电机.当你用手接触发电机的输出接头,并缓缓摇动发电机,手会感到麻手,说明这时手摇发电机的输出电压相当高(实测结果是,每秒钟摇4转,电压将高达120V).通过实验还会发现,用这种手摇发电机点不亮手电筒的小灯泡,但是,能使普通照明用的
If you have a hand-held old phone (magnet phone) on hand, you can use it to do some physical experiments because it has a small hand-cranked generator inside. When you touch the generator’s output connector, and Slowly shaking the generator, the hand will feel hemp hand, indicating that the output voltage of the hand-cranked generator is quite high at this time (the actual measurement result is that 4 rotations per second, the voltage will be as high as 120V). Through the experiment will find that with this A hand crank generator does not light the small light bulb of the flashlight, but it can be used for general illumination.