Calculate the resistivity of the material of a wire 1.0 m long 0.4 mm in diameter and having a resistance of 2 ohm
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2.512into10to the power 5
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resistance = resistivity * length / areaof sroosection
2 = ρ * 1 / (π*[0.2/1000]²)
ρ = 2 * π * 0.04 / 1000000
= 2 * 3.14 * 0.04 * 10⁻⁶
= 6.28 * 4 * 10⁻⁸
= 2.51 * 10⁻⁷
your answer is 2.51 * 10⁻⁷
hope this helps
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