NEET Physics Resistance & Resistivity MCQ Question
In the diagram shown above, the resistance R of a wire is measured to be 5.0 Ω with a length of 15 m and a cross-sectional area of 6.0 × 10^-7 m². What is the resistivity of the wire material?
2.0 × 10^-7 Ωm
5.0 × 10^-8 Ωm
1.5 × 10^-6 Ωm
3.0 × 10^-7 Ωm
Correct Answer
Detailed Explanation
Using the formula for resistivity, ρ = R × A / L, with R = 5.0 Ω, A = 6.0 × 10^-7 m², and L = 15 m, the resistivity ρ calculates to 2.0 × 10^-7 Ωm.
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