PhysicsCurrent electricityJAMB
A copper wire is 10 m long with cross-sectional area 1 × 10⁻⁶ m². Find its resistance. (Resistivity of copper = 1.7 × 10⁻⁸ Ω m)
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Answer: A. 0.17 Ω
R = ρL/A = 1.7 × 10⁻⁸ × 10 ÷ 10⁻⁶ = 0.17 Ω.
An AdmitMe practice question, written for the JAMB syllabus. Not an official past question.