OCR 2023 GCE Physics A H156/01: Breadth in physics AS Level Question Paper & Mark Scheme (Merged)

2 © OCR 2023 Section A You should spend a maximum of 25 minutes on this section. Write your answer to each question in the box provided. 1 What is a typical value, in cm, for the wavelength of microwave radiation? A 0.0003 B 0.03 C 3 D 300 Your answer [1] 2 The diagrams show four systems of forces with three forces acting at a single point. The forces are in the same plane. The diagrams are drawn to scale. Which system could be in equilibrium? A B C D Your answer [1] 3 © OCR 2023 Turn over d 3 An electron beam is passed through a thin slice of graphite and a diffraction pattern is produced. The approximate spacing between the carbon atoms in the graphite is d. The approximate de Brogie wavelength of an electron in the beam is λ. Which statement is correct? A λ ≈ d B λ ≈ 1 C λ “ d D λ K d Your answer [1] 4 A student investigates a conducting wire of constant cross-sectional area, at constant temperature. The resistance R is measured for a range of lengths L. The following graph is plotted: L Which expression is equal to the gradient of the graph? A resistivity B resistivity × cross-sectional area C resistivity cross-sectional area D cross-sectional area resistivity Your answer [1] R 4 © OCR 2023 250N 15° 5 A ray of monochromatic light is travelling through glass. The refractive index of the glass is 1.5. The ray is incident on a glass-air boundary with angle of inc