Say you have a glass rod that’s electrically neutral, and you rub it with a cloth.
假设您有一根电中性的玻璃棒, 然后用布擦拭它。
PBS趣味科普
The 1700s sparked a craze of electric entertainment, and people started rubbing glass rods and electrifying anything they could get their hands on: Women.
1700 年代引发了电娱乐的热潮,人们开始摩擦玻璃棒并让任何他们能拿到的东西带上电:女性。
Crash Course Physics 速成课物理
Today, we understand that the fur stole electrons during the process, giving the amber an overall positive charge, just like the glass rod.
A glass rod, stirring rod or stir rod is a piece of laboratory equipment used to mix chemicals and liquids for laboratory purposes. They are usually made of solid glass, about the thickness and slightly longer than a drinking straw, with rounded ends.