Electric Charge and Conductors/Insulators

What is the difference between conductors and insulators?

• Conductors allow the flow of water, while insulators do not.

• Conductors allow the flow of electric current, while insulators do not.

• Conductors are used in cooking, while insulators are used in construction.

• Conductors are transparent, while insulators are opaque.

Give an example of a good conductor of electricity.

• Wood

• Copper

• Rubber

• Plastic

Explain why metals are good conductors of electricity.

• Metals are good conductors of electricity because they have a sea of delocalized electrons that are free to move and carry electric charge.

• Metals are good conductors of electricity because they contain a high amount of protons

• Metals are good conductors of electricity because they are insulators

• Metals are good conductors of electricity because they have a negative charge

What is the role of free electrons in conducting materials?

• The role of free electrons in conducting materials is to carry electric current.

• The role of free electrons in conducting materials is to repel magnetic fields.

• The role of free electrons in conducting materials is to absorb light.

• The role of free electrons in conducting materials is to generate heat.

Why do insulators not conduct electricity?

• Electrons in insulators are not free to move and carry an electric current.

• Insulators are made of metal which cannot conduct electricity

• Insulators have too many free electrons to conduct electricity

• Insulators have a high resistance to electricity

Name a common insulator used in electrical wiring.

• PVC (Polyvinyl chloride)

• Aluminum

• Steel

• Glass

What is the effect of increasing the temperature on the conductivity of a conductor?

• The conductivity of a conductor becomes constant with increasing temperature.

• Increasing temperature has no effect on the conductivity of a conductor.

• The conductivity of a conductor decreases with increasing temperature.

• The conductivity of a conductor increases with increasing temperature.

Explain the concept of static electricity.

• Static electricity is the build-up of electric charge on the surface of objects, which can be caused by friction or contact with other materials.

• Static electricity is the same as current electricity

• Static electricity is the result of magnetic fields around objects

• Static electricity is the flow of electric charge through a conductor

How does lightning demonstrate the behavior of electric charge in the atmosphere?

• Lightning demonstrates the behavior of electric charge in the atmosphere by creating rainbows

• Lightning demonstrates the behavior of electric charge in the atmosphere by showing how electric charge can build up and create a discharge, similar to how it behaves in other electrical systems.

• Lightning demonstrates the behavior of electric charge in the atmosphere by causing earthquakes

• Lightning demonstrates the behavior of electric charge in the atmosphere by attracting metal objects

What are the implications of electric charge in everyday life?

• Electric charge only affects large industrial machinery

• Electric charge has no impact on everyday life

• Electric charge is only relevant in scientific experiments

• Electric charge has implications in powering electronic devices, providing lighting, and enabling communication through electrical signals.