What is resistance?

What determines a material’s resistance?

• Number of protons in its atoms

• Type of bonding in the material

• Opposition to the flow of electrons

• Amount of light it reflects

Which of the following materials is considered a good conductor?

• Plastic

• Rubber

• Neon

• Metal

Why are metallic materials good conductors?

• Their atoms vibrate less

• They have tightly bound electrons

• Their electrons are free to move

• They are chemically unreactive

What are electrolytic conductors?

• Solids with no free electrons

• Liquids or gases that can conduct electricity

• Materials with low thermal conductivity

• Insulators under pressure

What property makes materials like rubber and plastic insulators?

• They are heavy

• They have loosely bound electrons

• They are made of gases

• They have tightly bound electrons

What happens to nitrogen if it is heated enough?

• It explodes

• It becomes a conductor as a plasma

• It remains an insulator

• It turns into a metal

What are semiconductors?

• Materials with infinite resistance

• Conductors made of rubber

• Materials between conductors and insulators

• Gases used in light bulbs

What process is used to improve the conductivity of silicon?

• Condensation

• Fusion

• Doping

• Magnetization

What is the resistance of a good conductor like?

• High

• Infinite

• Variable

• Low

What gas is commonly used in incandescent bulbs?

• Neon

• Oxygen

• Argon

• Nitrogen