A scientist wipes a rubber rod with a wool cloth which leads to a negative charge on the rod. After this, the scientist touches the rod to a neutral metal sphere. This will transfer the negative charges from the rod to the sphere

Which statement explains what will happen to the negative charge, and why?(1 point)

The negative charges will spread out evenly across the sphere because charges naturally repel each other. This is known as the process of charge distribution or charge spreading.

A. It will spread uniformly over the surface of the sphere, because of the conducting nature of the sphere and similar charges push away from each other.

B. It will only spread to the air around the sphere, because negative charges need to occupy a big area.
C. It will slowly move to the bottom of the sphere, because the charges are heavy and will sink to the bottom.
D, It will remain only on one spot of the sphere, because the low conductivity of the metal prevents the charges from spreading out.

A. It will spread uniformly over the surface of the sphere, because of the conducting nature of the sphere and similar charges push away from each other.

This is the correct answer. The metal sphere is a conductor, which allows for the easy flow of electric charges. When the negatively charged rod is touched to the sphere, the excess negative charges on the rod will transfer to the sphere. The charges will spread out uniformly across the surface of the sphere due to the repulsion between like charges.

When the scientist touches the negatively charged rubber rod to the neutral metal sphere, the negative charges will transfer from the rod to the sphere. This is because objects with opposite charges attract each other, and when they come into contact, electrons (which carry the negative charge) can move from one object to another. In this case, since the rubber rod has a negative charge and the metal sphere is neutral (has no charge), the excess electrons on the rod will be attracted to the neutral sphere. As a result, the sphere will acquire a negative charge, while the rod will become neutral. This happens because the electrons want to distribute themselves evenly across both objects, resulting in the transfer of negative charges from the rod to the sphere.