Electric resistance
The electric resistance is the ability of a material to oppose to the flow of charge current in it. The electrical resistance experimentally depends upon how long or short is the material, or its cross sectional area. The resistance of a wire can be expressed as:
Electric resistance = resistivity * length / cross sectional area
The equation is:
R = ρ L/A
Where:
R= Electric Resistance
ρ=Resistivity
L=Length of the material
A= Sectional area of the material
