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An unknown material is rubbed with silk and becomes charged Explain how you could use a negative acetate strip or a positive glass rod to determine the type of charge on the unknown material?
Wiki User
∙ 14y ago
If you move the material near the negative acetate strip and they repel each other, the material negatively charged. If they move towards each other, it is positively charged.
If you move the material near the positive rod and they attract, the material is negatively charged. If they repel, it is positively charged.
This is because opposite charges attract and same charges repel.
Wiki User
∙ 14y ago
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