Question

Materials which do not allow an electric current to flow through them is known as.

Answer 1

Hint: The materials used are determined by the current kind. Conduction currents require mobile charges to travel through the material they are passing through. The source's charges push the charges inside the material, allowing the current to flow. In an (ideal, hence non-existent) vacuum, such currents will not flow. You can establish a conduit for electrons/ions to move even in a (nearly) vacuum, resulting in currents.

Complete step-by-step solution:
Materials that do not allow the electric current to flow through them are known as Insulators.
Insulators:
A material that does not conduct electrical current is known as an insulator. Paper, plastic, rubber, glass, and air are all good insulators. Although a vacuum is an insulator, it is not material. Insulation covers the majority of electrical conductors. Magnet wire is coated with a very thin layer of insulation to allow for more turns or larger wire in the winding of transformers and other devices. Insulators are typically rated in the hundreds of volts range, while certain power distribution insulators are rated in the hundreds of thousands of volts range. Insulators support and prevent electrical conductors from coming into contact with each other unintentionally.
Insulators include materials such as
glass,
rubber,
wood,
plastics.
The electrons in the insulators are so firmly bonded to one another that no free electrons are available for mobility. As a result, they are unable to conduct electricity.

Additional information:
Glass insulator:
In transmission and distribution networks, glass insulators have grown increasingly prevalent. For insulating purposes, annealed strong glass is employed. Compared to porcelain insulators, glass insulators have a variety of advantages.
Glass Insulators Benefits:
In comparison to porcelain, it has a very high dielectric strength.
It also has a high resistance.
It has a low thermal expansion coefficient.
When compared to a porcelain insulator, it has a higher tensile strength.
Because it is transparent in nature, it does not get as hot as porcelain when exposed to sunshine.
Because of its transparency, contaminants and air bubbles can be easily seen inside the glass insulator body.
Because the mechanical and electrical qualities of glass are unaffected by age, it has a very long service life.
Glass is, after all, less expensive than porcelain.

 Note:To prevent current from flowing from the conductor to the earth via the grounded supporting towers or poles, an insulator is installed between the tower or pole body and the current-carrying conductor.
Different types of insulators are employed in power systems depending on voltage considerations. A look at the different types of insulators and the circumstances in which they are used.