On what factors resistance may depends and define resistivity
Answers
Resistivity :- measuring of the resistance of a given specific material to electrical conduction is known as resistivity.
It is the longitudinal electrical resistance of a uniform rod of unit length and unit cross-sectional area. The reciprocal of conductivity is resistivity.
The resistivity of a material depends on its nature and the temperature of the conductor, but not on its shape and size. A good conductor has less resistivity. On the other hand, a bad conductor or insulator has high resistivity.
The factors on which resistivity depends are -
The length of the wire – increasing the length increases theresistance.
The thickness of the wire – increasing the thickness decreases theresistance.
The temperature of the wire – increasing the temperature increases theresistance.
Factors on which resistance of a conductor depends are:
1) on the lenght of conductor.
2) on it's(conductor) area of cross section.
3)on it's temperature.
4)on the nature of conductor
Resistivity is characterstic properties of materials