Electric Charge Basics

A material in which electrons are not able to move easily is called

• Insulators

• Conductors

The massive center of an atom contains protons and neutrons. What is this called?

• Orbital Shell

• Electron Cloud

• Nucleus

• Photon

Protons and Electrons balance the charge of an atom.

• True
• False

If a substance has a higher number of electrons than protons on its surface, what type of charge does it have?

• A positive charge.
• A negative charge.
• A neutral charge
• No charge at all

Which of the following is an example of creating charge through convection?

• Rubbing two insulators together to transfer electrons from one to another.

• Rubbing two insulators together to rearrange the electrons on each one, without transferring any.

• Bringing a charged insulator near to a conductor, but not letting them touch.

• None of these.

What do we call a positively charged atom?

• an electron

• a proton

• an ion

• a conductor

The electric force is created when two charges push or pull on each other.

• True

• False

A rubber balloon is rubbed against a person's hair. This is an example of creating charge through _______________.

• convection

• conduction

• insulation

• polarization

Do charged material often occur in nature?

• Yes, charges flow naturally and create large amounts of natural, charged material.

• No, charges are usually balanced within each atom, so charged material is not common in nature.

An electrician usually works with copper wiring. Why is this a better material than, say, rubber cabling?

• The copper is a good insulator and keeps the charges inside the wire.

• The rubber is a good conductor, and would let all the charges escape.

• The copper is a good conductor and lets the charges move around to create electricity.

• The rubber is a good conductor and lets the charges move around to create electricity.