Question

a point charge is a model that represents a charge as acting uniformly on its surroundings. what other characteristic does a point charge have?
a. it has no excess protons or electrons.
b. it has no excess neutrons.
c. it has no mass.
d. it has no volume.

Explanation:

A point charge is an idealized model in physics. It is considered to have no volume. Protons and electrons are charges themselves, so a point charge can have excess protons or electrons (so A is wrong). Neutrons are neutral, and the concept of a point charge is about charge distribution, not neutrons (so B is wrong). A point - charge can have mass (e.g., an electron is a point - like charge with mass), but the key non - physical idealization is zero volume.

Answer:

D. It has no volume.