GC: n
CT: Resistivity is also important in power distribution systems as the effectiveness of the earth grounding system for an electrical power and distribution system greatly depends on the resistivity of the earth and soil material at the location of the system ground.
Conduction is the name given to the movement of free electrons in the form of an electric current. Conductivity, σ is the reciprocal of the resistivity. That is 1/ρ and has the unit of siemens per metre, S/m. Conductivity ranges from zero (for a perfect insulator) to infinity (for a perfect conductor). Thus a super conductor has infinite conductance and virtually zero ohmic resistance.
S: ElectTut – https://bit.ly/2FAe3H4 (last access: 7 November 2018)
N: 1. From adjective resistive (another word for resistant / exhibiting electrical resistance) and suffix ity (expressing a particular quality).
- Property of, capacity for, or tendency toward resistance
- Electricity. Resistance per unit of area or volume, measured in ohms per meter: the reciprocal of conductivity.
2. Types of resistivity:
- resistivity, electrical resistivity or specific resistance: The tendency of a material to oppose the flow of an electric current. Resistivity is the reciprocal of the conductivity. The unit is the ohm meter. resistivity: term officially approved by the Electronics and Telecommunications Terminology Committee (Canada).
- thermal resistivity: The reciprocal of thermal conductivity.
- volume resistivity: The specific resistance of a material.
3. Thermal resistance is the ability of a material to resist flow of heat.
Thermal resistivity is the reciprocal of thermal conductivity and can be expressed as. r = 1 / k.
4. Resistivity and conductivity are both properties of conductors. Conductors are substances that allow the flow of electrical current or thermal energy through them. The most common and well-known conductors of electrical current are metals. The most common and well-known conductors of thermal energy are metal and glass.
Resistivity is the electrical resistance of a conducting material per unit length. In other words, it is the degree to which a conductor opposes the flow of electricity through itself, instead allowing the energy to flow out of the electrical circuit, most often as heat. Resistivity is useful in comparing various materials based upon their ability to conduct electrical currents. The unit of resistance is the ohm.
Conductivity, by contrast, is the degree to which a conductor allows the flow of electricity through itself. The unit of conductivity is the siemens (S). It was formerly called the mho. Good conductors retain heat, minimizing the loss of energy from the electrical circuit. Copper wires, for example, are a material with excellent conductivity. Materials such as air, cloth, or rubber have very poor conductivity
S: 1. Collins – https://bit.ly/2SAP8Zk; https://bit.ly/2QIrEUs (last access: 7 November 2018). 2. TERMIUM PLUS – https://bit.ly/2AWzfVy (last access: 7 November 2018); GDT – https://bit.ly/2BWoqor; https://bit.ly/2Qh5r0u (last access: 7 November 2018). 3. EngTB – https://bit.ly/2SAZU1E (last access: 7 November 2018). 4. DB – https://bit.ly/2E8teZ6 (last access: 7 November 2018).
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