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Materials that are sometimes classified as insulators and sometimes as conductors are called?
Wiki User
∙ 12y ago
semiconductors
Wiki User
∙ 12y ago
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Which type of conductors are used in capacitors?
The conductors in capacitors are typically made from thin plates (or foil) of very ductile metallic materials to get the most capacitance. These materials must also be inexpensive and widely available. Aluminum is typically the workhorse material for most conductors in capacitors. Tantalum is used as well for the Cathode plate. Silver is also appears in silver-mica capacitors, and are used for high-accuracy audio applications. I believe that Manganese Dioxide MnO2 is sometimes used, as well, for the anode plate. A capacitor is a passive electronic component consisting of a pair of conductors separated by a dielectric (insulator). When there is a potential difference (voltage) across the conductors, a static electric field develops in the dielectric that stores energy and produces a mechanical force between the conductors. An ideal capacitor is characterized by a single constant value, capacitance, measured in farads. This is the ratio of the electric charge on each conductor to the potential difference between them.
How to calculate the the number of insulators used in a transmission line?
The glass, 'dish', ('cap and pin') insulators used to support conductors from transmission towers are each rated to withstand a specific voltage. But this voltage depends upon the standards used by the electricity industry of the country in which you live but, typically, they are each designed for operating voltages within the range 10 - 12 kV. By dividing the effective line-to-earth value of the transmission voltage, by this value, you will be able to determine the the 'basic' number of dishes required. This figure, however, will only be a guide, as the voltage gradient across the string of insulators is not linear. Furthermore, additional dishes are sometimes required according to the environmental conditions affecting the transmission line. For example, if the line is near the coast, the dishes might be subject to salt deposits; if the transmission line is near industrial factories (e.g. steel works) then the line might be subject to deposits from airborne waste from those factories, etc. So, often, the number of dishes will be greater than that number required to provide the basic insulation level.
From what material is the microphone made of?
Microphones have been made from various materials. The diaphragm used to pick up the sound is thin metal. The magnet to convert the sound into electrical signals is sometimes metal sometimes a special material. The case of the microphone may be plastic or metal
What materials are used to make artificial limbs?
Artificial limbs must be light weight, so they are normally made of plastic. Sometimes they are made of titanium or aluminum, since both metals are light.
What is a real word of examples of examples of how a screw is used?
A screw may be used to fasten materials such as wood or metal to each other. Sometimes, a screw is left protruding from the surface of a wall, to be used as a portrait-hanger.
Is gas a good conductor of electricity?
Air and other gases are usually good insulators but sometimes they can be good conductors
Are two types of atoms metallic and nonmetallic?
Metallic and non-metallic is one of many ways of categorizing chemical elements. Metallic elements have a structure that allows free electrons to migrate from atom to atom within the structure of the material. These are called "conductors". Nonmetallic elements generally prevent the movement of electrons from atom to atom; they are "insulators". Starting after World War II, Dr. Robert Shockley developed another class of materials that sometimes would, and sometimes would not, conduct electricity. He called these "semi-conductors", and his discoveries form the basics of modern electronics.
Is conductors of heat and conductors of electricity the same thing?
Sometimes. Metals will conduct both heat and electricity. Glass will conduct heat but not electricity.
Is the inside of an outlet a conductor?
Inside an outlet there are conductors: hot, neutral, and sometimes ground. The rest of the inside of an outlet is insulator, to keep these conductors from shorting.
What is one substance sometimes used as an electrical insulator?
Cross-Linked Polyethylene and Polyvinyl Chloride are a couple of insulating materials used for the insulation of electrical conductors. This type of insulation allows the wires an insulation factor of 90 degrees C.
What are good thermal insulators in buildings?
Ionic compounds are good thermal insulators. Magnesium carbonate, an ionic compound, is sometimes used. Ionic compounds have extremely high melting points and therefore, if they were heated they would not melt.
What is production overhead?
Production overhead is any cost incurred in order to create a product. This usually includes: rent, utilities, equipment, maintenance and labor. Sometimes raw materials and scrap are also classified as overhead.
Which type of conductors are used in capacitors?
The conductors in capacitors are typically made from thin plates (or foil) of very ductile metallic materials to get the most capacitance. These materials must also be inexpensive and widely available. Aluminum is typically the workhorse material for most conductors in capacitors. Tantalum is used as well for the Cathode plate. Silver is also appears in silver-mica capacitors, and are used for high-accuracy audio applications. I believe that Manganese Dioxide MnO2 is sometimes used, as well, for the anode plate. A capacitor is a passive electronic component consisting of a pair of conductors separated by a dielectric (insulator). When there is a potential difference (voltage) across the conductors, a static electric field develops in the dielectric that stores energy and produces a mechanical force between the conductors. An ideal capacitor is characterized by a single constant value, capacitance, measured in farads. This is the ratio of the electric charge on each conductor to the potential difference between them.
What do scientists sometimes call aerogel?
Aerogels are a class of extremely lightweight materials that have air suspended in some solid material, in which the ratio of air to solid is extremely high. The usual kind of materials that we see in the "bluish" aerogel is made of silica. Aerogels are very heat-resistant, and are used by scientists in the aerospace industry to make lightweight insulators, or as a material that is used to catch space dust.
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.
What is the scientific name of a substance that lets electricity flow through it?
A substance that lets electricity flow through it is called a conductor (or sometimes, to be more explicit, it is called an electrical conductor). Substances which do not permit the flow of electricity are called insulators.
What solid that is a good conductor can be made into ornaments?
Metals are good conductors of electricity and are sometimes made into ornaments.
