Electric Conductors and Insulators

What is the term for materials that have low resistance to electric current?

• Electric insulators

• Electric conductors

• Semiconductors

• Superconductors

Which of the following is a good conductor of electricity?

• Wood

• Copper

• Rubber

• Plastic

What property do electric insulators have?

• Low resistance to electric current

• High resistance to electric current

• No resistance to electric current

• They conduct electricity easily

Which of the following is NOT a good electric conductor?

• Aluminum

• Steel

• Plastic

• Copper

What do the outer electrons of metal atoms do that allows metals to conduct electricity?

• They are tightly bound

• They are free to move

• They are shared with nonmetals

• They are lost to the air

Which material is an example of an electric insulator?

• Steel

• Water with impurities

• Rubber

• Aluminum

What happens to electric current when it has more than one material to travel through?

• It travels through the material with the most resistance

• It travels through the material with the least resistance

• It splits evenly between all materials

• It stops flowing

Which of the following is a property of most nonmetallic solids regarding electricity?

• They are good conductors

• They are good insulators

• They have no resistance

• They are superconductors

What is the main reason water with impurities can conduct electricity?

• It is a metal

• Impurities allow current to flow

• It is an insulator

• It has no resistance

Which of the following materials is mentioned as a good electric insulator?

• Copper

• Aluminum

• Wood

• Steel