When a rubber rod is rubber with wool, the rod becomes negatively charged. What can you conclude about the magnitude of the wool's charge after the rubber process? Why?

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To understand the charge on the wool after the rubber rod process, we can first look at the phenomenon called "charging by friction."

When a rubber rod is rubbed with wool, electrons from one material (in this case, the wool) are transferred to the other (the rubber rod). This transfer of electrons causes an imbalance in the charges of the materials involved.

Since electrons carry a negative charge, the rubber rod gains excess electrons and becomes negatively charged. Consequently, the wool loses electrons and becomes positively charged.

Thus, based on the principle of conservation of charge, we can conclude that the wool gains a positive charge after the rubbing process.