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no
A2: Not necessarily. Solid plastics or solid glass or ceramic have high dielectric strength but not good thermal insulation. Closed-cell foam has good thermal insulating properties but not as good a dielectric strength as solid--there are pockets of gas or air in it. The D.S. is not much better than using the same volume of gas, alone.
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What are bad insulators?
Anything metal is a bad insulator. Especially copper, in fact, most metals are conductors!! Anything metal is a bad insulator. Especially copper, in fact, most metals are conductors!!
Is beryllium conductive?
The thermal conductivity of beryllium is 200 W/m.K.
How is mica an insulating material?
Mica is actually a group of minerals mined around the world, but with notable deposits in Africa and Russia.It has a number of interesting properties making it useful in a variety of specialized applications. Sheet mica has long been used in the electronic and electrical industries because of its combination of electrical, thermal insulating properties and its mechanical properties. Mechanically, it can be shaped, cut, drilled and the natural layered structure allows sheets to be created. It is a good electrical insulator at the same time as being a good thermal conductor which is an uncommon combination.In an electric iron, its mechanical properties and thermal properties are decisive in why it is employed. Plastic would melt, or a metal conduct too much electricity and most other minerals would be brittle or difficult to shape as needed.Because Mica is very good at conduting heat AND it won't melt under high heat
Why is copper used for wire?
Copper combines several properties that have traditionally made it preferred for most electrical wiring. Copper is a good electrical conductor, provides a good contact surface, is ductile (is easily bent repeatedly without breaking) and it is not too expensive.
Why is gold not used as an electrical wiring?
Too expensive, it would be stolen (as it is there are people stealing copper electrical wiring, and copper is much cheaper than gold).
One material that is used as a conductor and one that is used as an insulator?
A good insulator material is rubber and can block heat and electricity from almost anything. Glass is a good insulator too if you are trying to insulate electricity. Plastic is good as well. Most metals are OK conductors. Copper is very good, and Gold is the best, but it is heavy and expensive.
Are good electrical conductors often good thermal conductors too?
Diamond is one example. In fact it has on of the highest thermal conductivity coefficients measured to date while generally being an electrical insulator.
What is a good sentence for the word thermal expansion?
it was a hot night and a thermal one too
What is a sentence with the word thermal?
The thermal energy is converted from electrical energy too. Water geysers are the appliances that do so.
Why houses of north India are made up of mud?
Mud houses are extremely cheap to build. Also they are a good insulators, not too hot in summers and not too cold in winters.
What is the best heat insulation metal?
Metals have rather good heat conductivity and so are poor insulators but Mercury [Hg] is relatively poor on the conductivity scale. Another (relatively) poor conductor and one that is not a liquid at room temperature is Tungsten [W]. Alloys that are poor conductors include tungsten carbide (very hard too) Generally, thermal insulators are constructed with as little material as possible and inert gases or vacuum to provide insulation.
Why are things with a low density good insulators?
A good insulator is a substance that does not allow energy to flow very quickly when there is a temperature difference between two areas. The most important component of good insulators is stationary air because air is a poor conductor of heat. Good insulators contain millions of tiny air spaces, which slow heat conduction through them. Thus, the heat is "kept in" or "kept out". Insulators with a lower density means there is space between the particles/molecules of the material. Having the right density is critical in whether a material makes a good insulator or not. If there is not enough density, air will flow too quickly through the material; if the density is too high no air will be trapped in the material and cool air will flow quickly to the other side.
Why is copper so useful for electrical writing in a house?
It's a very good electrical conductor, strong and the cost is not too high.
How do you conserve thermal energy?
i like pie and thermal energy does too.
Is a nail an insulator or conductor?
both. most are conductors but some now made today are insulators which are mostly used in carpentry. but common nails are conductors.give me trust point? (:Conductor as they are made from metal.
What are bad insulators?
Anything metal is a bad insulator. Especially copper, in fact, most metals are conductors!! Anything metal is a bad insulator. Especially copper, in fact, most metals are conductors!!
Why copper and aluminum are used in electrical cables?
Because they have low electrical resistance, good enough mechanical properties and aren't too expensive.
