![]() So then why does the same thing happens with a styrofoam bowl, which is an insulator? As Physics Girl explains, this is due to the same phenomenon that causes us to get electric shocks all the time. ![]() And when the generator is turned on, the pan flies off like magic, because like charges repel like charges. If you place a metal tray on top of the generator, it'll take on the same positive charge because it's conductive. Using a trusty Van de Graaff generator (which you may remember as that zappy sphere from high school science class), Physics Girl demonstrates how electrons will leap through the air from another object to try and restore the balance, creating a spark and a loud electric shock in the process.Īnd this is where things get fun. ![]() Static charge builds up when an object's surface has lost a lot of electrons and builds up a positive charge. First of all, you need to understand how a shock works.
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