Resistivity is a constant for any particular material, and independent of that material's physical dimensions or shape. However, it does vary with temperature which is why resistivity is always quoted at a particular temperature. Variations in resistivity due to temperature change is the reason that the resistance of a material varies with temperature. In SI, resistivity is expressed in ohm metres.
1. Metals
2. Stress
3. Alloys
4. Hard age
The electrical conductivity of metals is dependent on temperature and purity.
The electrical conductivity of metals is lower at low temperature.
The electrical conductivity
It has a low melting point but has excellent electrical conductivity.
Copper has a higher melting point than steel, so it does not melt during spot welding. Additionally, copper has higher thermal conductivity, which allows it to distribute heat more efficiently and prevent it from concentrating in one spot. This combination of a higher melting point and better heat dissipation makes copper electrodes suitable for spot welding applications.
Increasing the temperature will increase the reaction rate, as will finding a suitable catalyst.
Salt in solution improves conductivity but it does not make a conductor as good as a metal. Deionized water has an electrical conductivity of 5,5 * 10-6 [S*m-1] but Seawater (3,5% salt in solution) has a conductivity of 4,8 [S*m-1] compared to Sliver with a conductivity of 6,3 * 107 [S*m-1] (the best known at room temperature)
The electrical conductivity
It has a low melting point but has excellent electrical conductivity.
Extremely pure water (Kolrausch water) has a very poor electrical conductivity.
Copper has a higher melting point than steel, so it does not melt during spot welding. Additionally, copper has higher thermal conductivity, which allows it to distribute heat more efficiently and prevent it from concentrating in one spot. This combination of a higher melting point and better heat dissipation makes copper electrodes suitable for spot welding applications.
For its monetary value making it suitable for bullion (currency references), jewellery and gilding, its chemically-inert nature and high conductivity make it suitable for various applications in electronic and medical components.
Like gold and silver, copper is malleable, that is, it can be bent and shaped without cracking, when either hot or cold. It can be rolled into sheets as thin as 1/500 of an inch.Copper also is ductile, meaning it can be drawn out into thin wire. A copper bar four inches thick can be heated, rolled, then drawn into a round wire so thin that it is thinner than a strand of human hair.Here are some more physical properties, which can describe copper (not quantified, but a list of properties that can be quantified): hardnes, ductile. Electrical conductivity. Thermal Conductivity. Melting point, density. Others which don't really have a quantity: Lustre / shinyness, color.
its useful for electrical wiring because that is the way it is
dc series motor
This is not actually a question, and doesn't parse. Water an be subjected to many measurements, with a few common types being volume, temperature, electrical conductivity, and mass. Thus, a suitable response is "Has anyone really been far even as decided to use even go want to do look more like?"
how to increse the Tensil more than 1100 for Crmo4
Yes, electrical engineers can do sap modules. Suitable scope for them would be SAP PP, SAP QM, OR SAP MM.
The topic is not suitable to be discussed in this forum. I suggest reading a box or taking a class.