Conductors & Non-Conductors

The video explains the differences between conductors and non-conductors, focusing on their chemical structures and how they affect electrical conductivity. Metallic solids, like copper, are conductors due to their lattice structure and free-moving electrons. Superconductors, such as some pure metals and metal oxides, offer minimal resistance when supercooled. Non-metal conductors, like graphite, conduct electricity with more resistance. Insulators, including most nonmetals and solid ionic substances, have tightly bound electrons, preventing electrical flow. The video also discusses how an electric shock can occur despite the human body being an insulator.

Which of the following metals is commonly used in electrical wiring due to its conductivity and cost-effectiveness?

• Silver

• Copper

• Gold

• Platinum

What is a superconductor?

• A material that conducts electricity only when heated

• A material that does not conduct electricity at all

• A material that conducts electricity with no resistance at very low temperatures

• A material that conducts electricity with high resistance

Which of the following is an example of a non-metal conductor?

• Polythene

• Glass

• Graphite

• Copper

What term is used to describe materials that do not readily conduct electricity?

• Conductor

• Semiconductor

• Insulator

• Transistor

How can an electric shock occur in the human body?

• By being in a dry environment

• By wearing rubber shoes

• By touching a low-voltage source

• By a large voltage causing current to pass through the body