NCERT Exercise 3.4 - Current Electricity
Question: A negligibly small current is passed through a wire of length 15 m and uniform cross-section 6.0 × 10⁻⁶ m², and its resistance is measured to be 5.0 Ω. What is the resistivity of the material at the temperature of the experiment?
Answer: Resistivity = **2 × 10⁻³ Ω m**.
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