A positively charged metal sphere A is brought into contact with an uncharged me

Question

A positively charged metal sphere A is brought into contact with an uncharged metal sphere B. As a result:
1. both spheres are positively charged
2. A is positively charged and B is neutral
3. A is positively charged and B is negatively charged
4. A is neutral and B is positively charged
5. A is neutral and B is negatively charged

In addition, a negatively charged rubber rod is brought near the knob of a positively charged electroscope. The result is that:
1. Electroscope leaves will move farther apart
2. The rod will lose its charge
3. Electroscope leaves will tend to collapse
4. Electroscope will become discharged
5. Nothing noticeable will happen

Explanation / Answer

A answer 3 B answer 4

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