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Science and TechnologySEE 2074

a) What is the difference between a conductor and an insulator? [2] b) Write any two uses of aluminum. [2] c) What is the chemical symbol of aluminum? [1]

5

Answer

· Based on the official syllabus and past papers
Updated

a) Difference between a conductor and an insulator

Conductors and insulators are two types of materials that behave differently when it comes to the flow of electric current. The key differences between them are as follows:

Conductor Insulator
A material that allows electric current to flow through it easily. A material that does not allow electric current to flow through it easily.
Electrons are loosely bound to the atoms and can move freely. Electrons are tightly bound to the atoms and cannot move freely.
Examples include copper, aluminum, iron, silver, and gold. Examples include rubber, glass, wood, plastic, and air.
Used in electrical wiring, circuits, and appliances. Used to cover electrical wires, in switches, and as protective materials.

b) Two uses of aluminum

Aluminum is a versatile metal with numerous applications in daily life and industry. Two common uses of aluminum are:

  1. Electrical Wiring: Aluminum is widely used in electrical wiring due to its excellent conductivity and lightweight nature. It is often used as an alternative to copper in power transmission lines.
  2. Packaging: Aluminum is used in the manufacturing of cans, foils, and containers for food and beverages. Its lightweight, non-toxic, and corrosion-resistant properties make it ideal for packaging materials.

c) Chemical symbol of aluminum

The chemical symbol of aluminum is Al.

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