Circuits, conductors and insulators Review

Which of the following materials is a good conductor of electricity?

• Copper
• Wood
• Rubber
• Plastic

Heat moves in three ways: conduction, convection, and radiation.

• True
• False

What is an insulator?

• A material that does not allow electricity to flow through it easily
• A device that stores electrical energy
• A conductor with high resistance
• A type of electrical circuit

Which of the following is an example of an insulator?

• Rubber
• Copper
• Aluminum
• Iron

What is the purpose of a circuit?

• To provide a path for electricity to flow
• To store electrical energy
• To block electrical current
• To create heat

What happens to a circuit when a switch is turned off?

• The circuit is open and electricity cannot flow
• The circuit is closed and electricity flows continuously
• The circuit generates more electricity
• The circuit explodes

Which of the following statements is true about conductors?

• They allow electricity to flow freely
• They only work with batteries
• They block electricity completely
• They are always made of plastic

What is the role of a battery in a circuit?

• To provide the electrical energy needed to power devices
• To convert electrical energy into light
• To act as a conductor
• To insulate the circuit

What type of material is typically used to wrap electrical wires for safety?

• Insulator
• Resistor
• Capacitor
• Conductor

Why are metals like copper often used for electrical wiring?

• Because they are good conductors of electricity
• Because they are good insulators
• Because they are lightweight
• Because they are cheap and break easily