Final answer:
The student's question pertains to a charged plastic sphere and is rooted in high school-level physics, addressing topics such as electric potentials and Coulomb's law.
Step-by-step explanation:
The question involves a charged plastic sphere and the determination of the electrical properties related to the charge distribution over its surface. This is a topic commonly found in high school physics, specifically within the context of electrostatics, which is the study of stationary electric charges or fields as opposed to electric currents.
The question asks for the identification of the charge placed on the plastic sphere and further inquires into related concepts, which might include the calculation of electric potentials and electric fields. This type of problem would typically require the use of the formula for the electric potential of a charged sphere and Coulomb's law, which are a part of the high school physics curriculum.