If the cross-sectional area of a piece of wire is doubled what happens to the resistance in the wire?

Question

If the cross-sectional area of a piece of wire is doubled what happens to the resistance in the wire?
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Solution 1

The resistance of a wire is inversely proportional to its cross-sectional area. This relationship is described by the formula:

R = ρL/A

where:

  • R is the resistance,
  • ρ (rho) is the resistivity of the material,
  • L is the length of the wire, and
  • A is the cross-sectional area of the wire.

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