Electrical Conductivity
Electrical Conductivity
Electrical Conductivity:
The measure of the ability of a substance to allow the flow of an electric current is called electrical conductivity. In simple words we say that electric conductivity is the ability of the substance to conduct electricity. For example : Substances that are good conductors (metals) have high electrical conductivity as compared to substances that are poor conductors (i.e. insulators). Some liquids, but not all, are good conductors.
Basics of Electrical Conductivity :
It is the ratio of current density to the electrical field strength. Also, the greater the value of the conductivity, the lower the resistance it provides to the flow of electric current. Moreover, the value of electrical conductivity depends on the ability of electrons or other charge carriers for example holes to move within the lattice of the material.
Conductivity Formula :
The conductivity formula is the inverse of the resistivity that is :
= refers to electrical conductivity
= refers to resistivity
Conductivity Unit:
The conductivity unit is Siemens per meter() . Also referred to as mho.
Which of these does not conduct electricity ? | |||
| Right Option : D | |||
| View Explanation | |||
Conductivity increases in the order of : | |||
| Right Option : B | |||
| View Explanation | |||
______________ refers to resistivity. | |||
| Right Option : B | |||
| View Explanation | |||
Students / Parents Reviews [20]
Abhyas institute is one of the best coaching institute in the vicinity of Ambala cantt.The institute provides good and quality education to the students.The teachers are well experienced and are very helpful in solving the problems. The major advantages of the institute is extra classes for weak...
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Aman Kumar Shrivastava
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Ayan Ghosh
8thAbhyas institute is one of the best coaching institute in the vicinity of Ambala Cantt area. The teachers of the institute are well experienced and very helpful in solving the problems of the students.The good thing of the institute is that it is providing extra classes for the students who are w...
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