Two electrically neutral materials are rubbed together. One acquires a net positive charge. What happens to the other?

Answer 1

Well, electric charge is conserved, so what do you think happened?

Since the materials we started with were neutral, the substance that acquired a positive charge had to have lost some electrons to the other substance, which inevitably acquired a net negative charge.

We have all seen the effect of walking on a woolly carpet and then the discharge when we touch a metal door knob; this is because static charges can be developed after the transfer of only a few electrons due to the enormously large magnitude of the electric force.

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Answer 2

Mateo Aguilar

A net negative charge is acquired by the other material.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.