Insulators vs Conductors

Which of the following materials is considered a good insulator?

• Copper

• Glass

• Aluminum

• Gold

What is the primary use of conductors in electrical circuits?

• To stop the flow of electric current

• To store electric charge

• To facilitate the flow of electric current

• To insulate components from each other

Which type of insulator is commonly used in overhead power lines?

• Glass insulators

• Rubber insulators

• Ceramic insulators

• Plastic insulators

What property makes metals good conductors of electricity?

• High melting point

• High density

• Free electrons

• Transparency

Which of the following is NOT a use of conductors?

• Wiring in homes and buildings

• Making electrical components like resistors

• Transmission of electrical power

• Insulating devices from electrical shock

What makes air an insulator?

• Its color

• Its density

• Its composition

• Its lack of free charge carriers

In what form are glass insulators typically used in electrical applications?

• Wires

• Coatings

• Beads

• Bushings

Why are conductors important in making electrical circuits?

• They prevent the circuit from overheating.

• They increase the resistance in the circuit.

• They allow the control of the flow of electric current.

• They are not important in electrical circuits.

Which of the following is a characteristic feature of an insulator?

• High thermal conductivity

• Ability to conduct electric current easily

• High resistance to the flow of electric current

• Low melting point

For what reason might a conductor be coated with an insulating material?

• To increase its conductivity

• To make it heavier

• To prevent electrical shock

• To decrease its melting point