Question

1.) Predict what will happen to the disk of an uncharged electroscope when a postively charged object is brought near the disk.

2.) Continue your previous answer so that you describe what happens to charge in the other parts of the electroscope. Use this to infer what happens to the vanes.
3.) Predict how the vanes will react when a negatively charged object is brought near the disk of an uncharged electroscope. Explain.

Answer 1

When a positively charged object is brought near an uncharged electroscope, the disk becomes positively charged and the leaves repel each other. When a negatively charged object is brought near the electroscope, the disk remains uncharged and the leaves repel each other.

Step-by-step explanation:

When a positively charged object is brought near the disk of an uncharged electroscope, the disk will be attracted to the positively charged object. This is because opposite charges attract each other. As a result, the electrons in the disk will move toward the positively charged object, causing the disk to become positively charged. The leaves of the electroscope, which are also negatively charged, will repel each other and spread apart.

If a negatively charged object is brought near the disk of an uncharged electroscope, the disk will be repelled by the negatively charged object. This is because like charges repel each other. As a result, the electrons in the disk will move away from the negatively charged object, and the disk will remain uncharged. The leaves of the electroscope, being negatively charged, will also repel each other and spread apart.