Difference between low resistivity materials and high resistivity materials
Answers
We know that electric current that flows in a circuit is as similar to the water flowing through a river. In a river rock, branches and other particles resist the flow of water. in a very similar fashion, a circuit has elements to resist the flow of electrons.
Resistance is nothing but this property of resisting the flow of electrons or the current. The unit of resistance is ohm. One ohm is equal to volt per ampere. From Ohm’s law, we have seen that R = V / I, Where V is the voltage and I is the current.
Resistors are used to resist or control the flow of electrons by the conductive material. They do not provide any power to the circuit. They may reduce the voltage and current passing through the circuit. Hence, resistors are passive devices. Most of the resistors are made up of carbon, metal or metal oxide film.
Resistivity
Resistivity
Resistivity is the resistance per unit length and cross-sectional area. It is the property of the material that opposes the flow of charge or the flow of electric current. The unit of resistivity is ohm meter.
Low resistivity meterials are always good conductors electricity and that of high resistivity materials are good producers of heat.
Hope u understand