A student is investigating the elastic properties of a carbon-fibre rod. Before conducting a tensile test, they use a digital micrometer to measure the diameter of the rod.
The micrometer has a systematic zero error of +0.04 mm. When measuring the rod, the reading displayed on the micrometer is 2.48 mm.
What is the corrected cross-sectional area of the carbon-fibre rod?
4.99×10−6 m24.99 \times 10^{-6}\text{ m}^24.99×10−6 m2
4.83×10−6 m24.83 \times 10^{-6}\text{ m}^24.83×10−6 m2
4.68×10−6 m24.68 \times 10^{-6}\text{ m}^24.68×10−6 m2
1.87×10−5 m21.87 \times 10^{-5}\text{ m}^21.87×10−5 m2
26 exam-style questions on OCR A A Level Physics Making measurements and analysing data, covering Measurements and uncertainties. Each one has a worked solution and a mark scheme showing where the marks go.