OCR Interchange October 2021 AS Level Physics/ H156/01 Breadth in physics/Top score

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October 2021 AS Level Physics A H156/01 Breadth in physics Time allowed: 1 hour 30 minutes * H 1 5 6 0 1 * INSTRUCTIONS • Use black ink. You can use an H B pencil, but only for graphs and diagrams. ... • Write your answer to each question in the space provided. If you need extra space use the lined pages at the end of this booklet. The question numbers must be clearly shown. • Answer all the questions. • Where appropriate, your answer should be supported with working. Marks might be given for using a correct method, even if your answer is wrong. INFORMATION • The total mark for this paper is 70. • The marks for each question are shown in brackets [ ]. • This document has 20 pages. ADVICE • Read each question carefully before you start your answer. Turn over SECTION A You should spend a maximum of 25 minutes on this section. Answer all the questions. Write your answer to each question in the box provided. 1 Archimedes’ principle is written below with one word missing. The upthrust acting on an object in a fluid is equal to the of the fluid displaced. What is the missing word? A density B mass C volume D weight Your answer [1] 2 Which of the following is not a source of electromotive force (e.m.f.)? A chemical cell B light-dependent resistor C power supply D solar cell Your answer [1] 3 A student is explaining the photoelectric effect to his friend. Which statement is correct? A An electron is emitted when the photon energy is greater than the threshold frequency. B Increasing the intensity increases the maximum kinetic energy of the emitted electrons. C Photons are emitted from the metal during the photoelectric effect. D The energy of a photon is proportional to the frequency of the electromagnetic radiation. Your answer [1] 4 The air resistance F acting on an object falling vertically through air is given by the expression F = 0.13 v 2 where v is the speed of the object. The mass of the object is 30 g. What is the terminal velocity of this object? A 0.20 m s−1 B 0.48 m s−1 C 1.5 m s−1 D 2.3 m s−1 Your answer [1] 5 An object is travelling along a horizontal surface with kinetic energy 16 J and speed v. A force acts against the motion of the object. The work done by this force is 4.0 J. What is the final speed of the object in terms of v? A 0.75v B 0.87v C 1.1v D 1.3v Your answer [1] 6 Four electrical circuits are shown below. A B C D All the resistors are identical. Each circuit is connected to the same power supply. Which circuit dissipates the least power? Your answer [1] 7 A student investigated four different springs A, B, C and D. A mass of different weight is hung from each spring and the extensions are measured. The results are shown in the table below. Weight hung from spring / N Extension of spring / cm A 2.0 5.2 B 4.0 4.6 C 6.0 3.5 D 8.0 1.5 All of the springs obey Hooke’s law. Which spring has the largest elastic potential energy? Your answer [1] 8 Which pair of quantities have the same S.I. base units? A strain, elastic potential energy B strain, force constant C stress, force constant D stress, Young modulus Your answer [1] [Show More]

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