NEET Physics Resistance & Resistivity MCQ Question
A copper wire has a length of 2 meters and a cross-sectional area of 1 mm². If the resistivity of copper is 1.7 x 10^-8 Ωm, what is the resistance of the wire?
0.034 Ω
0.17 Ω
3.4 Ω
0.017 Ω
Correct Answer
Detailed Explanation
The resistance R of a conductor is given by the formula R = ρl/A. Using the given values, R = (1.7 x 10^-8 Ωm)(2 m)/(1 x 10^-6 m²) = 0.034 Ω.
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