a) Resistivity

ai) resistivity of a material; the equation R = L / A

resistance = the specific current oppositions of specific components

resistivity = the electrical property of specific materials

resistance = directly proportional to the length of the wire

resistance = inversely proportional to the cross-sectional area of the wire

ρ = (RA) / L

• resistivity (Ωm) = (resistance (Ω) x cross-sectional area (A)) / length (m)