【Daily Question】12.26 Definition: Conductivity
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This post was last edited by Cuaili Yisu on 2016-1-4 at 15:38. Definition of a noun: Electric conductivity. Electric conductivity is a measure that indicates the ability of a material to conduct electricity. When a voltage is applied across the ends of a conductor, its charge carriers move in a certain direction, thereby generating an electric current. Conductivity is defined by Ohm’s law as the ratio of current density to electric field strength; some materials exhibit anisotropic conductivity, which requires a 3 X 3 matrix to be represented (in mathematical terms, this is a second-order tensor, which is usually symmetric). Conductivity is the reciprocal of resistivity. The unit in the International System of Units is siemens per meter (S·m-1): An electrical conductivity meter is an instrument used to measure the electrical conductivity of solutions. http://bbs.hcbbs.com/thread-1487895-1-1.html (Source: Haichuan Chemical Industry Forum) [Petroleum and Chemical Industry Event] Selection of the Best SimSun Font http://bbs.hcbbs.com/thread-1514512-1-1.html (Source: Haichuan Chemical Industry Forum)
#Here, a quick response to # means that in a medium, the product of this quantity and the electric field strength is equal to the conductivity current density; it can also be referred to as conductivity. For isotropic media, conductivity is a scalar ； For anisotropic media, conductivity is a tensor. In ecology, conductivity is the ability of a solution to conduct electric current, expressed as a numerical value. The unit is expressed in Siemens per meter (S/m).
This post was last edited by Anran on 2015-12-26 09:41. Electric conductivity is a measure that indicates the strength of a material’s ability to conduct electric current. When a voltage is applied across the ends of a conductor, its charge carriers move in a certain direction, thereby generating an electric current. Conductivity is defined by Ohm’s law as the ratio of current density to electric field strength; some materials exhibit anisotropic conductivity, which requires a 3 X 3 matrix to be represented (in mathematical terms, this is a second-order tensor, which is usually symmetric). Conductivity is the reciprocal of resistivity. The unit in the International System of Units is siemens per meter (S·m-1): An electrical conductivity meter is an instrument used to measure the electrical conductivity of solutions.
A parameter indicating the ease of charge flow in a material, which is related to temperature.
Conductivity is a measurement that indicates the strength of a material’s ability to conduct electricity. It is the reciprocal of resistivity, denoted by the Greek letter κ, with κ=1/ρ.
Conductivity is a measurement that indicates the strength of a material’s ability to conduct electricity. It is the reciprocal of resistivity, denoted by the Greek letter κ, with κ=1/ρ.
Conductivity, a physical concept, refers to the quantity in a medium such that its product with the electric field strength equals the conductivity current density; it can also be called electrical conductivity. For isotropic media, conductivity is a scalar ； For anisotropic media, conductivity is a tensor. In ecology, conductivity is the ability of a solution to conduct electric current, expressed as a numerical value. The unit is expressed in Siemens per meter (S/m). Conductance is a parameter used to describe the ease with which charge flows through a material. In the formula, conductivity is represented by the uppercase letter G. The standard unit for conductivity is the siemens (abbreviated as S), which was formerly known as the mho. When a current of 1 ampere (1 A) flows through the cross-section of an object and there is a voltage of 1 volt (1 V), the electrical conductivity of that object is 1 S. Siemens is actually equivalent to 1 ampere per volt. If G is the conductivity (in siemens), I is the current (in amperes), and E is the voltage (in volts), then: G = I/E. Generally, in such direct-current circuits, the current is proportional to the conductivity when the voltage remains constant. If the conductivity doubles, the current also doubles ； If the conductivity is reduced to 1/10 of its initial value, the current will also become 1/10 of its original value. This rule also applies to many low-frequency AC systems, such as household circuits. In some alternating current circuits, especially in high-frequency circuits, the situation becomes very complex, as the components in these systems store and release energy. Conductivity is also related to resistance; if R is the resistance of a component or device (in ohms), and conductivity is G (in siemens), then: G = 1/R. What are the influencing factors? Edit
Conductivity refers to the fact that in a medium, the product of this quantity and the electric field strength is equal to the conductivity current density.
Conductivity, a physical concept, refers to the quantity in a medium such that its product with the electric field strength equals the conductivity current density; it can also be called electrical conductivity.
Conductivity, a physical concept, refers to the quantity in a medium such that its product with the electric field strength equals the conductivity current density; it can also be called electrical conductivity. For isotropic media, conductivity is a scalar ； For anisotropic media, conductivity is a tensor. In ecology, conductivity is the ability of a solution to conduct electric current, expressed as a numerical value. The unit is expressed in Siemens per meter (S/m).
Conductivity refers to the fact that in a medium, the product of this quantity and the electric field strength is equal to the conductivity current density.