what mineral is often used as an insulator in electrical equipment?
964473
Silica; it's what makes glass, and ceramics have insulative properties. Other than that, it would be petroleum products such as plastics, and vinyls. Rubber comes from a plant.
445485
A dielectric material is one that doesn't conduct electricity and can also be referred to as a conductor. This means they don't have many "free" electrons zooming throughout the material, ie not very many electrons that are tied to one specific atom in your solid. Asbestos and diamond are both examples of conductors.
723937
copper. because it can oxidize easier. That is why statue of liberty is green.
112334
Air is a good insulator as far as it doesn't circulate. It has low conductivity (about 1,4 Btu/ft h ºF), but if you let the air circulate there can be a very good heat transmission due to convection.\nThat's why insulators try to trap small amounts of air inside, so the air stays immobile.\nVaccumm would be a much better insulator.
34806
Because the stuff they use to coat the wire is (A) an insulator (B) flexible enough to bend where the wire does (C) durable to last at least 30 or 40 years (D) impervious to water (E)able to withstand the highest voltage the insulator is designed and UL listed for (F) able to withstand the temperature that the insulator is designed and UL listed to still be operable for.
107432
Thermal insulation is the reduction of thermal conduction to a point where it reduces the flow of energy from one system to another.  In laymans terms, you have a flow of energy (usually in Btu/s or J/s aka Watts), between two systems of different temperatures.  By isolating the systems from each other with an insulator, you are slowing the transfer of heat and energy from one system to another. \nThat is the goal of an insulator - reducing (slowing) the rate of heat transfer.
107743
By definition, a metal conducts electricity.
527426
chemical and electrical
1023141
Tantalite is the most widespread tantalum mineral and makes for an important ore of the industrially useful metal. Tantalum is used in alloys for strength and higher melting points, in glass to increase the index of refraction, and in surgical steel, as it is non-reactive and non-irritating to body tissues. \n\nNotable Occurrences include Newry, Maine; San Diego Co., California; Colorado and Amelia, Virginia, USA; Renfrow County, Ontario, Canada; Madagascar; Sweden; Norway and Finland
444242
Yes very good insulation as most domestic wiring is insulated with PVC there are some specialist plastics which can be made to conduct electricity but not normaly.\njust to add for all the people saying that it is not an insulator my work involves working on live overhead line equipment up to 11000 volts and the only thing that keeps me alive is the plastic insulation on the truck and tools
732031
Sodium bicarbonate in solid form is a poor conductor.    However, it will ionize when dissolved in water and conduct electricity then.
231458
A material that is neither a good conductor of electricity (like copper) nor a good insulator (like rubber). The most common semiconductor materials are silicon and germanium. These materials are then doped to create an excess or lack of electrons. \nComputer chips, both for CPU and memory, are composed of semiconductor materials. Semiconductors make it possible to miniaturize electronic components, such as transistors. Not only does miniaturization mean that the components take up less space, it also means that they are faster and require less energy.
940188
Tungsten has at least three times the melting point of copper, and they are both conductors, but when it comes to electricity, Copper is the winner, because Tungsten has more resistance to electricity therefore it is less conductive than Copper.\n\nTungsten due to its resistance is used in Light bulbs,\nand copper, which is more malleble  is used in mostly covering wires.\n\nHope it helps,
512462
By "natural magnet", I assume you mean the mineral magnetite (Fe3O4).  At room temperature (and at temperatures below ~850 K) magnetite is a semiconductor, above ~850 K, it is behaves like a metallic conductor.\n\nThe resistivity of pure magnetite at room temperature is about 0.33 ohm*meter, which is close to that of pure germanium (=0.46 ohm*meter).  "Good" conductors of electricity (like metals) have resistivities less than about 10^-6 ohm*meter, while good insulators have resistivities greater than aabout 10^9 ohm*meter.  As you can see, at room temperature, magnetite lies somewhere in between.
251200
It is being used in the rubber and plastics as well as the wire and cable industries.  For a more complete understanding of its uses check wikipedia.
466747
touch a metal which is well grounded.
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Coal, iron ore, copper, chromium, antimony, mercury, gold, barite, borate, celestite (strontium), emery, feldspar, limestone, magnesite, marble, perlite, pumice, pyrites (sulfur), clay, arable land, and hydropower.