The rubber is not used to make electric wires because it is an insulator , if it is used for these purposes then the result is that current doesn't pass through it and electrical gadgets not glow and not give lights

Introduction:
Electric wires are an essential component of electrical systems, used to transmit electrical energy from one point to another. While rubber is a versatile material with many applications, it is not commonly used to make electric wires. This is primarily due to several factors that make rubber unsuitable for this purpose.

Insulation Requirements:
One of the key requirements for electric wires is insulation. Insulation is necessary to prevent the flow of electrical current from the wire to the surrounding environment and ensure the safety of users. Rubber, although it has some insulating properties, is not an ideal material for insulation in electric wires due to the following reasons:

1. Mechanical Strength:
Rubber lacks the required mechanical strength to withstand the stresses and strains experienced by electric wires. It is a soft and flexible material, making it prone to damage and wear. Electric wires need to be able to withstand tension, bending, and other mechanical stresses without breaking or losing their insulation properties. Rubber, being a relatively weak material, would not provide sufficient mechanical strength for electric wires.

2. Heat Resistance:
Electric wires can generate heat due to the flow of electrical current. Therefore, they need to be able to withstand high temperatures without melting or degrading. Rubber has a relatively low melting point, making it unsuitable for use in electric wires where high temperatures can be generated. Other materials, such as thermoplastics or thermosetting plastics, are commonly used for their superior heat resistance.

3. Electrical Properties:
Rubber does possess some electrical insulating properties, but it is not as effective as other materials commonly used for electric wire insulation. For instance, rubber has a lower dielectric strength, which is the maximum electric field strength a material can withstand before electrical breakdown occurs. Other materials, such as PVC (polyvinyl chloride) or XLPE (cross-linked polyethylene), have higher dielectric strengths, making them more suitable for electric wire insulation.

Conclusion:
Although rubber is a versatile material with many applications, it is not commonly used to make electric wires due to its lack of mechanical strength, limited heat resistance, and suboptimal electrical properties. Other materials, such as plastics, offer superior insulation properties and are better suited for the demanding requirements of electric wire manufacturing.