A scientist is researching what happens when a neutral metal sphere located on an insulated stand is touched by a negatively rod. The set up for the experiment is shown in the picture below. What will happen to the excess electrons when the negatively charged rod touches the metal sphere?

Answer 1

When a negatively charged rod is brought into contact with a neutral metal sphere, the following process occurs:

1. Charge Distribution: The negatively charged rod has an excess of electrons. When the rod touches the neutral metal sphere, the negative charges (electrons) will be repelled by the excess negativity of the rod and will move towards the sphere. Electrons will flow from the rod into the metal sphere.

2. Neutralization: Because the metal sphere is a conductor, it allows electrons to move freely. As electrons from the rod transfer to the sphere, the sphere becomes negatively charged as it accumulates these excess electrons.

3. Separation of Charges: If the negatively charged rod is removed after contact, the metal sphere will retain the excess electrons that it gained. This leaves the metal sphere with a net negative charge.

4. Final State: After the negatively charged rod is removed, the metal sphere remains negatively charged due to the surplus of electrons it received from the rod.

In summary, the excess electrons from the negatively charged rod will flow into the neutral metal sphere, causing the sphere to become negatively charged once the rod is removed.