How to change the resistance of a conductor if its cross-sectional area is doubled?
| February 9, 2021 | education
General formula for determining the resistance of a conductor:
R = rL / S,
where r is the resistivity of the conductor material, L is the length of the conductor, S is the cross-sectional area.
We increase the cross-sectional area by a factor of two with the same length and resistivity:
R₁ = rL / 2S:
R / R₁ = (rL / S) / (rL / 2S) = 2;
R₁ = R / 2.
Answer: Resistance will be halved.
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