Heat & Electricity

What is the difference between conductors and insulators?

• Conductors allow the flow of electrical current due to free electrons, while insulators do not allow the flow of electrical current.

• Conductors block the flow of electrical current, while insulators allow the flow of electrical current.

• Conductors are used to store electrical charge, while insulators are used to conduct electricity.

• Conductors have high resistance to electricity, while insulators have low resistance.

Name one property of heat conductors.

• High electrical conductivity

• Poor thermal insulation

• Low thermal conductivity

• High thermal conductivity

Which metal is a good conductor of heat?

• Copper

• Silver

• Gold

• Aluminum

What material is commonly used in electrical wires due to its good conductivity?

• Gold

• Copper

• Aluminum

• Steel

Why are metals good conductors of heat?

• Metals have free electrons that can move easily through the material, transferring thermal energy quickly.

• Metals are poor conductors of electricity

• Metals contain insulating properties

• Metals have high resistance to heat flow

Give an example of a good heat conductor.

• Aluminum

• Copper

• Gold

• Plastic

What type of material does not allow heat to pass through easily?

• Conductors

• Reflective surfaces

• Insulators

• Translucent materials

Which type of material is used to insulate electrical wires?

• Aluminum

• plastic or rubber

• Plastic

• Glass

What is the purpose of using insulators in electrical wires?

• To make the wires more flexible

• To prevent the flow of electricity to the surroundings

• To increase the flow of electricity

• To reduce the cost of production

Name a common insulator material used in household appliances.

• rubber

• glass

• metal

• plastic