The resistance in a wire (circular cross section) is given by the formula:

R = ϱ × L/A R = ϱ × LA

Where R is the resistance in ohms (Ω) and ϱ is the resistivity of the material (constant for a material) in Ωm. Find the resistance and it's uncertainty in a copper wire of length 50 cm and radius 10 cm. The resistivity of copper is 2 × 10⁻⁶ Ωm 2 × 10^–6 Ωm and the uncertainty of L and r measurement is WL = 0.5 cm & r = 0.1cm.

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The resistance in a wire circular cross section is given by the formula Given copper wi... View the full answer