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describe the difference between resistance and resistivity
resistance = the specific current oppositions of specific components
resistivity = an electrical property of specific materials
state the relationship between the resistance and the length of a wire
directly proportional
state the relationship between the resistance and the cross-sectional area of a wire
inversely proportional
state the formula for the resistivity of a material
ρ = (RA)/L
resistivity of a material (Ωm) = (resistance (Ω) x cross-sectional area (m²)) / length (m)