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from wiedemann franz law we know that thermal conductivity/electrical conductivity=constant

that is sigma inv. proportional to k

thus a material having large electrical conductivity has low thermal conductivity

and moreover

we know

R=pL/A

p=RA/L

1/P=L/RA i.e lower area means greater conductivity(electrical)

and lower thermal conductivity

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What large group of materials are good thermal conductors and good electrical conductors?

metals


What large group of materials are good thermal conductors and electrical conductors?

transition metals check on google the periodic table of elements by Christian Okutu


Why are alkali metals good heat conductors and electrical conductors?

Short Answer:For all practical purposes, any metal will be both a good conductor of electricity and a good conductor of heat. Normally, the pure form of the alkali metal does conduct electricity and is also a good thermal conductor, both characteristics being a consequence of the conduction electrons in the bulk material.Long Answer:In this case, if we use the physics definition of metal and not the chemistry definition, then a metal is defined as a material that conducts electricity well. These electrical conductors usually have a higher thermal conductivity because the same electrons that are participating in electrical conduction are also participating in thermal conduction. In general terms then, good electrical conductors are good thermal conductors with a few notable exceptions, e.g. diamond.Caveat:In chemistry, a large swath of the period table labels atoms to be metals and this is not actually a proper characterization related electrical or thermal properties. These properties do not depend on the individual atoms but rather these physical properties are only manifested in bulk materials and depend on temperature, composition, crystal or amorphous structure, etc. Some materials, for instance, will change from insulating to conducting under pressure.


Does plastic transfer heat easily?

Basic Answer:Electrical insulators do not conduct electricity and are are typically among the poorer heat conductors.Good electrical conductors are metals and metals are typically very good heat conductors.Complicated Answer:The term "insulator" is hardly appropriate in reference to thermal conductivity if one means to say that the material has low thermal conductivity. The difference between good thermal conductor and poor thermal conductors is a factor of perhaps a hundred or for extremely different materials such as air (very poor) and diamond (excellent) is a factor of 100,000. That is modest compared to the difference between poor conductors (rubber) and excellent (copper) which is a factor of a billion billion billion.The connection between good heat conductors and good electrical conductors is a reliable but not a law of nature. Good electrical conductors are good thermal conductors due to the fact that electrons participate in both processes. Nearly free electrons are the reason metals are electrical conductors and contribute a large part of the thermal conductivity. (Diamonds are a peculiar exception.)The connection between poor electrical conductors and poor thermal conductivity is less good and really only a consequence that the electrons are not there to help out.


How does thermal conduction happen fastest?

Thermal conduction happens fastest in materials with high thermal conductivity, such as metals like copper or aluminum. These materials have closely packed atoms and free electrons that allow heat to move quickly through them. Additionally, thermal conduction is most efficient in materials with good thermal contact and large surface areas for heat transfer.


Material that does not allow an electric charge to pass trough it?

An insulator is a material that does not allow an electric charge to pass through it easily. This is because insulators have tightly bound electrons that are not free to move and carry electrical charge like in conductors. Common examples of insulators include rubber, plastic, glass, and ceramic materials.


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They include: Shiny 'metallic' appearance, Solids at room temperature, High melting points, Low ionization energies and Large atomic radii. Other common properties include: Electrical conductors, Thermal conductors, Ductile, Malleable and Low electronegativities.


What is the relationship between specific heat and thermal conductivity in materials?

The relationship between specific heat and thermal conductivity in materials is that specific heat measures the amount of heat needed to raise the temperature of a material, while thermal conductivity measures how well a material can transfer heat. Materials with high specific heat can absorb more heat without a large temperature change, while materials with high thermal conductivity can transfer heat quickly.


What is a aerial bundle conductor?

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The motion of charges also creates an electromagnetic field around the conductor that exerts a mechanical radial squeezing force on the conductor. A conductor of a given material and volume (length x cross-sectional area) has no real limit to the current it can carry without being destroyed as long as the heat generated by the resistive loss is removed and the conductor can withstand the radial forces. This effect is especially critical in printed circuits, where conductors are relatively small and close together, and inside an enclosure: the heat produced, if not properly removed, can cause fusing (melting) of the tracks. Since all conductors have some resistance, and all insulators will carry some current, there is no theoretical dividing line between conductors and insulators. However, there is a large gap between the conductance of materials that will carry a useful current at working voltages and those that will carry a negligible current for the purpose in hand, so the categories of insulator and conductor do have practical utility. Thermal and electrical conductivity often go together (for instance, most metals are both electrical and thermal conductors). However, some materials are practical electrical conductors without being a good thermal conductor In science and engineering, conductors are materials with low resistivity, this due to the presence of mobile charged particles within the material. In metallic conductors, such as copper or aluminum, the movable charged particles are present because atoms have loosely held valence electrons. See electrical conduction. All conductors contain electric charges which will move when an electric potential difference (measured in volts) is applied across separate points on the material. This flow of charge (measured in amperes) is what is meant by electric current. In most materials, the rate of current is proportional to the voltage (Ohm's law,) provided the temperature remains constant and the material remains in the same shape and state. The ratio between the voltage and the current is called the resistance (measured in ohms) of the object between the points where the voltage was applied. The resistance across a standard mass (and shape) of a material at a given temperature is called the resistivity of the material. The inverse of resistance and resistivity is conductance and conductivity. Most familiar conductors are metallic. Copper is the most common material for electrical wiring, and gold for high-quality surface-to-surface contacts. However, there are also many non-metallic conductors, including graphite, solutions of salts, and all plasmas. See electrical conduction for more information on the physical mechanism for charge flow in materials. 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Materials like water, sand, and concrete can absorb thermal energy due to their high heat capacity. Additionally, phase change materials (PCMs) can absorb and release large amounts of thermal energy during the process of changing phase, such as from solid to liquid.


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Some of the Common Properties of metals: Shiny 'metallic' appearance Solids at room temperature (except mercury) High melting points High densities Large atomic radii Low ionization energies Low electronegativities Usually, high deformation Malleable Ductile Thermal conductors Electrical conductors


Compare conductor and insulator?

Conductors and insulators are different and simalar in many ways.Two ways they are simallar are they both have electrons and have something to do with electricity.Three ways they are different that conductors let heat and electricity go through it .On the other hand insulators do not let heat or electreicity go through it easily.Another way is conductors transfer eelectrons easily but meanwhile the insulator psses on electrons with difficulty.One last thing is that conductors are not current but insulators are current. HOPE I HELPED YOU