An engineer is characterising the electrical properties of a newly synthesized thin-film semiconductor. They need to express the electrical resistivity, ρ\rhoρ, of the material in terms of S.I. base units.
Which of the following is the correct representation of the S.I. base units for resistivity?
kg m3 s−3 A−2\text{kg}\,\text{m}^3\,\text{s}^{-3}\,\text{A}^{-2}kgm3s−3A−2
kg m2 s−3 A−2\text{kg}\,\text{m}^2\,\text{s}^{-3}\,\text{A}^{-2}kgm2s−3A−2
kg m3 s−2 A−2\text{kg}\,\text{m}^3\,\text{s}^{-2}\,\text{A}^{-2}kgm3s−2A−2
kg m2 s−3 A−1\text{kg}\,\text{m}^2\,\text{s}^{-3}\,\text{A}^{-1}kgm2s−3A−1
29 exam-style questions on OCR A A Level Physics Physical quantities and units, covering Physical quantities and S.I. units. Each one has a worked solution and a mark scheme showing where the marks go.