A-LevelPhysicsD.C. circuits9702/12 · May/June 2016 · Q341 Mark

Which equation is used to define resistance?

Aenergy = (current)² × resistance × time

Bpotential difference = current × resistance

Cpower = (current)² × resistance

Dresistivity = resistance × area ÷ length

✓ Correct answer

B: potential difference = current × resistance

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Topic: D.C. circuits, A-Level Physics (syllabus 9702). Multiple choice, 1 mark.
Source: A-Level Physics, May/June 2016 Paper 1 Variant 2, question 34.

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