Transcription: This is an example of how static electricity works. Rubbing a glass rod with a silk cloth causes the rod to acquire a positive charge. When this rod is touched to aluminum foil spheres, the rod shares some of its positive charge with the spheres. The rod and spheres then repel each other, as do the two spheres if they are brought together. Rubbing a plastic rod with a wool cloth causes the rod to acquire a negative charge. When this rod is touched to aluminum foil spheres, the rod shares some of its negative charge with the spheres. The rod and spheres then repel each other as do the two spher ...
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