Question

Classify the following as conductors and insulators:
Eraser, coin, glass, pencil lead, needle, key, iron nail, plastic scale, wood, vinegar,
dry air.

Answer 1

Classification is as follows -

Conductors -

needle, coin, key, iron nail, vinegar

Insulators -

Eraser, pencil lead, glass, plastic scale, wood, dry air

• Insulators are objects that can not conduct heat and electricity. On the other hand, conductors can easily conduct heat and electricity.
• The difference lies in absence of free electrons in insulators.
• Conductors have free electrons which help in the transportation of charges thus carrying current.
• Depending upon the property of conduction, they have different applications. For example, the conductor is used as a utensil while an insulator is used as its handle.

Answer 2

The classification of the materials is given below:

Materials under the category of conductors includes:

1. Coin

2. Pencil lead

3. Needle

4. Key

5. Iron nail

Materials under the category of insulators includes:

1. Eraser

2. Glass

3. Plastic scale

4. Wood

5. Vinegar

6. Dry air

Conductors are the materials that has the ability to conduct heat as well as electricity. But, insulators do not conduct any kind of heat ot electricity.

In conductors, there are free electrons which shows movement and hence electricity is conducted whereas insulators do not have electrons and hence is incapable of conducting electricity.

Conductors and insulators have different properties and hence are used accordingly.

For example, in the manufacturing process of vehicle engine, iron (a conductor) is used to produce heat. Insulators like rubber or plastic is used to cover the electrical wires to prevent shock.

Characteristics of materials to give their uses:

https://brainly.in/question/12906562