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Resistance and resistivity

Resistance and resistivity

Labeled cylindrical wire showing length L, circular cross-section, diameter d, and shaded area A

Resistance belongs to a particular piece of wire, so it changes if the wire is longer or thinner. Resistivity ρ\rhoρ is a property of the material itself at a given temperature, so two copper wires can have different resistances but the same resistivity.

Resistivity Lesson

  1. A Level
  2. /Physics
  3. /Resistivity

Step-by-step lessons on AQA A Level Physics Resistivity. Each one builds up to exam-style questions. Physics is one of the most mathematically demanding A Levels -- at least 40% of the marks require maths skills at Level 2 (GCSE) standard or above, so build calculation and graph-handling fluency alongside the conceptual content from the start.

Lessons