Understanding Conductors of Electricity
Electricity is an essential part of our daily lives, and understanding conductors is crucial for grasping basic electrical concepts.

What is a Conductor?
- Conductors are materials that allow electricity to flow through them easily.
- They have free electrons that can move around, facilitating the flow of electric current.

Why is Copper a Conductor?
- Copper is known for its excellent conductivity.
- It has a high number of free electrons, which makes it efficient in transmitting electrical energy.
- This property is why copper is widely used in electrical wiring and electronic devices.

Comparison with Other Materials
- Plastic:
- It is an insulator, meaning it does not conduct electricity.
- Used to coat wires and prevent accidental shocks.
- Rubber:
- Like plastic, rubber is also an insulator.
- It provides safety by preventing the flow of electricity where it’s not desired.
- Wood:
- Wood is generally a poor conductor.
- While it can conduct some electricity when wet, it is primarily used as an insulator.

Conclusion
In summary, among the options provided, only copper is a good conductor of electricity. Its properties make it invaluable in electrical applications, while plastic, rubber, and wood serve as insulating materials to keep us safe from electric currents.