Electroscope

This week I made an Electroscope. First I took a clear glass cup and a piece of cardboard. I cut the cardboard into a circle that was the same size as the cup. Next I cut a line into the middle of the cardboard circle. Then I made two tear dropped shaped pieces of tin foil and bent a paperclip so that all but the bottom curve was straight. After that I put the tinfoil tear drops on the curve and I slid this whole unit into the cutted cardboard. I taped the cardboard to the opened part of the cup so that it represented a lid. Next I blew up a balloon and rubbed it against felt. Finally I put the balloon on the paper clip. This resulted in the tin foil moving. The tin foil moved because the paperclip conducted the balloon’s energy. 

 

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