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Resistance and resistivity are both properties of materials and components that relate to the flow of electric current.
Resistance is a characteristic of a wire or component that measures how difficult it is to pass current through it. Resistivity is a characteristic of the material used to make the wire or component. Resistance is directly proportional to the length and temperature of the conductor, and inversely proportional to the cross-sectional area of the material. Resistivity increases linearly with temperature. The SI unit of resistance is the ohm, and the SI unit of resistivity is the ohm-meter. The formula for resistance is R = V/I, or R = ρ(L/A) where V = Voltage, I = Current, and ρ = Resistivity.
Related Test: A Level Physics Practice Test: Electric Current, Potential Difference and Resistance
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