Electrostatics Test Corrections

When you charge a balloon by rubbing it on your hair this is an example of what method of charging?

• Friction
• Conduction
• Grounding
• Induction

If a negatively charged rod touches a conductor, the conductor will be charged by what method? 

• Friction
• Conduction
• Induction
• Convection

What charge will the metal plate have?

• positive; protons attract protons

• positive; protons attract electrons

• negative; protons attract electrons

• negative; protons attract protons

A charged balloon is brought near an electroscope but DOES NOT touch the electroscope.  This is an example of charging by

• Conduction
• Convection
• Friction
• Induction

What happens to the force between two charged objects when you double the distance between them?

• Increases 2F

• Increases 4F

When a plastic rod is rubbed with wool, the wool acquires a positive charge because

• protons are transferred from the wool to the rod
• protons are transferred from the rod to the wool
• electrons are transferred from the rod to the wool
• electrons are transferred from the wool to the rod

Coulomb's Law says that force is ______ related to charge and ______ related to the square of the distance between charges.

• inversely, directly

• directly, inversely

• directly, directly

• inversely, inversely

The equations for Electrostatic Force and Gravitational Force look similar but they have some big differences. Choose all the differences between each equation.

• Electric force is weaker

• Electric force is stronger

• Electric force only attracts

• Electric force attracts and repels

Why does the balloon stick to the neutral wall?

• The positive charges are attracted to the balloon.

• The negative charges are attracted to the balloon.

• The positive charges move away from the balloon,

• The negative charges move away from the balloon,

Describe what happens to the electric potential energy between two charges.

• Increases

• Decreases

• Stays the same