The table shows the relative electrical conductivity of different metals. Electrical conductivity is the ability of a material to allow electric current to flow through it. The metal with the highest electrical conductivity is most suitable for use in electrical wiring because:

• Reduced Energy Loss: Higher conductivity means less resistance to the flow of electrons. This results in less energy being lost as heat during the transmission of electricity. This is important for efficiency and reducing power consumption.
• Efficient Power Transmission: Lower resistance allows for more efficient transmission of electrical power over long distances.
• Reduced Heat Generation: Less energy loss as heat translates to lower operating temperatures of the wires, improving safety and extending the lifespan of the wiring.

While other factors like cost and ductility are also important considerations in selecting a wiring material, electrical conductivity is the primary factor determining suitability.

Metals are chosen for various applications based on their unique physical properties. Aluminium is particularly valued for its combination of properties. Here's a breakdown of its uses:

• Aircraft Manufacturing: Aluminium's key advantage is its low density. This is crucial for aircraft as it reduces the overall weight of the plane. Lighter aircraft require less fuel to fly, leading to improved fuel efficiency and reduced emissions. While strong, aluminium is significantly lighter than steel, making it ideal for structural components like wings and fuselage.
• Overhead Electrical Cables: Aluminium is also used in overhead electrical cables due to its low density. This reduces the load on supporting structures (towers). Furthermore, aluminium has good electrical conductivity, allowing electricity to flow efficiently with minimal energy loss.
• Food Containers: Aluminium's resistance to corrosion is a major benefit in food containers. It doesn't readily react with food or the environment, preventing contamination and extending the shelf life of packaged foods. It's also lightweight and easily recyclable.

Copper is the preferred metal for electrical wiring primarily because of its excellent electrical conductivity. This means it allows electric current to flow through it with very little resistance, minimizing energy loss as heat. Another important property is its ductility. Ductility refers to the ability of a metal to be drawn into a wire without breaking. Copper's high ductility allows it to be easily drawn into thin wires, making it practical for wiring applications. While other metals might be conductive, copper's combination of high conductivity and ductility makes it the most efficient and practical choice for electrical wiring.