The resistivity of aluminum is 2.82 ✕ 10−8 Ω · m. (a)Find the resistance of an aluminum wire (in ohms) with a radius of 1.24 mm and a length of 1.28 m. _________Ω (b)Calculate the volume (in m3) of aluminum in the wire. _________m3 (c) Suppose that volume of aluminum is formed into a new wire with a length of 2.02 m. Find the new resistance of the wire (in ohms). _________Ω

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Resistivity

Resistivity is a characteristic property of the conductor’s material that measures the extent to which the material opposes the flow of current. It is denoted by the Greek letter “rho”. Electrical resistivity, also known as specific resistance, depends on the nature of the material of the conductor and is unaffected by its dimensions.