Insulators and Conductors
What is an insulator?
Some good conductive objects are called conductors. For example: a metal body, the earth, graphite.
What is an conductor?
Some weak conductive object is called insulator. Such as: rubber, glass, plastic, ceramic, oil, water, dry paper, dry sticks, dry air.
What is the cause of the conductive and insulating?
The conductivity causes: the conductor capable of freely moving charges (+, -) (metal conductive because the large number of free electrons in the metal (-)); insulation reasons: almost charge atoms are bound within the range not free to move.
Do insulators and conductors have a clear boundary?
Insulators and conductors donot have an obvious boundary. Once conditions changed, the electrical insulator can become a conductor, and the conductor could be turned into an insulator. For example: heating insulation could make some electronic break the shackles and the atom becomes a free of charge, in this time, the insulator becomes a conductor.
Can we see the conductor and insulator in our daily life?
Conductors and insulators are commonly used in our daily life, we often need to use some of the insulator to conductor wrap to facilitate the use of our energy security, such as high voltage insulator.