3. A 0.20-m long metal rod has a radius of 1.0 cm and a resistance of 3.2 x 10³ Ω. What is the resistivity of the metal? a. 1.6 x 10⁻⁸ Ω·m b. 5.0 x 10⁻⁸ Ω·m c. 16 x 10⁻⁸ Ω·m d. 160 x 10⁻⁸ Ω·m
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Step 1: The resistivity of a material is given by the formula: $$ρ = \frac{RA}{l}$$ where: * ρ is the resistivity * R is the resistance * A is the cross-sectional area * l is the length Show more…
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