explain the factors that influence the resistance of the electric conductor
Answers
The electrical resistance of a material is a measure of how the material impedes the flow of electrons through it. ... The resistance of wire depends upon several factors: The length of the wire – increasing the length increases the resistance. The thickness of the wire – increasing the thickness decreases the resistance
1) Dimensions of wire (length and area)
R α l/A.
As length increases resistance also increases.
2) Temperature.
ρ = ρ0 [1 + α (T – T0)]
Correspondingly, R can be formed in equation.
In the case of metals or conductors, when the temperature increases, the resistance of the metal increases as a result.
In case of insulators opposite happends.
3) Nature of the material
Characters of a material like lattice defect, impurities etc... influences reistance.