Physical Science - Electric Charge

Fill in the word that completes each statement. Building up electric charges on a Van de Graaff generator is an example of static ___ . Lightning is an example of static ___.

electricity discharge

Use the drop-down menus to complete each statement. ___ is the process of charging an object without touching it. ___ is the process of charging a sphere by touching it with a charged rod.

Induction Conduction

Use the drop-down menu to answer the question. A student is going to produce static charge in a glass rod by rubbing it with a piece of silk. Which method of transferring charge does this image illustrate?

friction

As the amount of charge on two objects increases, the strength of the electrical force between the objects increases. decreases. varies. remains the same.

increases

Sonia was experimenting with electric charges. She tied two inflated balloons together, held them next to each other, and rubbed both with a piece of wool. What did Sonia observe, and why?

Sample Response: Sonia observed that the two balloons repelled each other. This is because both balloons acquired the same charge when she rubbed them with the piece of wool, and like charges repel each other.

Describe what happens to the electric field lines when two objects with unlike charges are brought near each other.

Sample Response: When two objects with unlike charges are brought near each other, their electric field lines combine, showing that the objects attract each other.

As the distance between two charged objects increases, the strength of the electrical force between the objects varies. remains the same. increases. decreases.

decreases

An object becomes positively charged when it loses electrons. loses protons. gains electrons. gains neutrons.

loses electrons.

Use the drop-down menus to answer the questions. How do objects with the same charge interact? How do objects with opposite charges interact? How do uncharged objects interact?

repel attract have no effect