A laboratory researcher is calibrating a Hall probe to measure the magnetic flux density of a high-strength neodymium magnet. Which of the following shows the correct SI base units for magnetic flux density?
kg m s−2A−1\text{kg m s}^{-2}\text{A}^{-1}kg m s−2A−1
kg s−2A−1\text{kg s}^{-2}\text{A}^{-1}kg s−2A−1
kg m2s−2A−1\text{kg m}^2\text{s}^{-2}\text{A}^{-1}kg m2s−2A−1
kg s−1A−1\text{kg s}^{-1}\text{A}^{-1}kg s−1A−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.