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If a large enough electric field is applied how does an electric conductor become an insulator?
Wiki User
∙ 14y ago
If a very large electric field is applied on a conductor then a phenomenon of a dielectric breakdown takes place and it looses all its charge carriers to the nearest conductor. Hence becoming an insulator.
Wiki User
∙ 14y ago
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How can semiconductor material be made to become either a conductor or an insulator?
zds
Is metal a conductor of electricity or an insulator?
Metal is a conductor of electricity, however when heated most metals become poor conductors as the atoms begun to vibrate and block the path of the electrons.
7 Give examples of a conductor and an insulator?
If we speak in terms of electrical conductivity, some good insulators are ceramics, plastics, rubber and glass. Conductors are, on the other hand, metals in general: copper, silver, gold, but there are some good conductors that are not metals, like graphite and some salt solutions.
Is cardboard a good conductor of electricity?
Cardboard is an insulator of electricity. It is not the best insulator to use for this as cardboard can be affected by moisture and any corrosion of nearby batteries. If it becomes wet with an electrolyte solution (such as salt water), it could become a conductor under certain conditions.To test this, put a battery and a light in series and leave the contacts open between the light and the battery. Then touch the wire to the cardboard and the cardboard to the battery. The light will not light up.
Explain how air can become a good conductor and what happens when this occurs?
air can become a good conductor when it is heated to very high temperatures
How can semiconductor material be made to become either a conductor or an insulator?
zds
Is metal a conductor of electricity or an insulator?
Metal is a conductor of electricity, however when heated most metals become poor conductors as the atoms begun to vibrate and block the path of the electrons.
7 Give examples of a conductor and an insulator?
If we speak in terms of electrical conductivity, some good insulators are ceramics, plastics, rubber and glass. Conductors are, on the other hand, metals in general: copper, silver, gold, but there are some good conductors that are not metals, like graphite and some salt solutions.
Can lead coated with gold particles become a conductor of electricity?
The metal lead is already a conductor: it is used on battery connections in automobiles. However, a coating of gold would make it a better conductor of electric current.
Can an insulator become a conductor?
Sometimes. In most materials, no. However, things like vacuum tubes and MOSFETs in electrical amplifying equipment will change between insulators and conductors based on a "control" voltage. Computers rely on this behavior for their most basic principles of operation. Technically, all insulators are conductors because they conduct electricity through them. The difference is that insulators conduct a lot less electricity. Thus, for a conductor to become an insulator, we would have to raise the electrical resistance to a level that we could consider "insulating". In most materials this can only be achieved by changing the temperature, and the temperature change required for this is impractical to a great degree. Almost all electrical devices, however, rely on the ability of electrical switches to change from insulator to conductor to insulator again at will. Depending on the voltage applied to the "control" part of a MOSFET transistor, its resistance could be extremely high (several thousand or million ohms) or extremely low (about 0.08 ohms). Also the voltage will have a great deal to do with it. At a high enough voltage some material may brake down and conduct a large amount of current, llike a zener diode.
Is a shiny element element a good conductor of thermal energy and electric current?
Yes, this is mostly true. It starts to become untrue near silicon.
Is cardboard a good conductor of electricity?
Cardboard is an insulator of electricity. It is not the best insulator to use for this as cardboard can be affected by moisture and any corrosion of nearby batteries. If it becomes wet with an electrolyte solution (such as salt water), it could become a conductor under certain conditions.To test this, put a battery and a light in series and leave the contacts open between the light and the battery. Then touch the wire to the cardboard and the cardboard to the battery. The light will not light up.
Which electrons are responsible for current in a material?
The conduction band electrons. These are valence electrons that become delocalized in conductors and form an "electron gas" that fills the bulk of the conductor and can flow as a fluid in response to electric fields applied across the conductor.
Why does a wire that carries an electric current not become electrically charged?
To become electrically charged, a conductor must either have an excess of electrons (negatively charged) or a deficiency of electrons (positively charged). For every free electron moving around in a current-carrying conductor, there is a corresponding proton within the fixed atoms, so the conductor is neither negatively- nor positively-charged, but neutral.
How electric iron become hot when electric current passes through it?
The electrons in the current have a lot of energy due to the tiny electric force on each one and the very large number of electrons involved. As they move from atom to atom in a metal conductor, some of this energy redistributes to the metal atoms. This energy causes the conductor atoms to move faster, which means they get hotter, and the heat flows to the surface of the iron.
How and when does a tree becomes a conductor of lightning?
during a thunderstorm, the electric charge built up in the clouds becomes unbalanced. to become balanced again it disperses the energy to whatever it is closest to or a good conductor. (such as a lightning rod or a tree) sort of like a giant static shock.
Explain how air can become a good conductor and what happens when this occurs?
air can become a good conductor when it is heated to very high temperatures
