The correct answer is C.
When the negative charges from the rod are transferred to the neutral metal sphere, they will distribute themselves evenly over the surface of the sphere. This is because like charges repel each other, so they will spread out as much as possible to minimize repulsion between them. Additionally, the sphere is a conductor, meaning that the negative charges are free to move throughout the entire sphere. Thus, the charge will distribute itself evenly over the surface of the sphere.
A student rubs a rubber rod with fur, producing a negative charge on the rod. The student then touches the rod to a hollow, neutral metal sphere that stands on an insulating plastic stand. This transfers negative charges from the rod to the sphere:
image 63f9196b581c4f17bbe56cfd6ddd781f
Which statement best predicts what will happen to the charge, and why?
A.
It will quickly spread to the air around the sphere, because it will seek to occupy as large a volume of neutral matter as possible.
B.
It will remain at the point of contact between the rod and the sphere, because resistance in the metal prevents the charges from easily moving.
C.
It will distribute itself evenly over the surface of the sphere, because like charges repel and the sphere is a conductor.
D.
It will slowly drift to the bottom of the sphere, because the charges rapidly attach to individual atoms, making them slightly heavier than surrounding atoms.
1 answer
3 answers