2023 AQA AS PHYSICS 7407/2 Paper 2 Question Paper & Mark scheme (Merged) June 2023 [VERIFIED]

2023 AQA AS PHYSICS 7407/2 Paper 2 Question Paper & Mark scheme (Merged) June 2023 [VERIFIED] AS PHYSICS Paper 2 Wednesday 24 May 2023 Afternoon Time allowed: 1 hour 30 minutes Materials You are advised to spend about For this paper you must have: 35 minutes on Section C • a pencil and a ruler • a scientific calculator For Examiner’s Use • a Data and Formulae Booklet Question Mark • a protractor. 1 Instructions 2 • Use black ink or black ball-point pen. 3 • Fill in the boxes at the top of this page. 4 • Answer all questions. • You must answer the questions in the spaces provided. Do not write 5–34 outside the box around each page or on blank pages. TOTAL • If you need extra space for your answer(s), use the lined pages at the end of this book. Write the question number against your answer(s). • Do all rough work in this book. Cross through any work you do not want to be marked. • Show all your working. Information • The marks for questions are shown in brackets. • The maximum mark for this paper is 70. • You are expected to use a scientific calculator where appropriate. • A Data and Formulae Booklet is provided as a loose insert. *JUN* IB/M/Jun23/E7 7407/2 2 Section A Answer all questions in this section. 0 1 . 1 Figure 1 shows a micrometer screw gauge. Figure 1 What is the reading on the micrometer? Tick ( ) one box. 6.25 6.75 7.25 8.25 *02* [1 mark] Do not write outside the box IB/M/Jun23/7407/2 3 0 1 . 2 A metal wire of diameter d is held in the gap between the anvil and the spindle. Just before the reading of d is taken, the gap is closed using the ratchet and not the thimble. Explain why the gap is closed in this way. [1 mark] 0 1 . 3The mass per unit length μ of the metal wire is given by μ = πρd 2 4 where ρ is the density of the metal. Values of d and μ are used to calculate ρ. The percentage uncertainty in d is 1.2%. The percentage uncertainty in μ is 2.0%. Calculate the percentage uncertainty in the result for ρ. [2 marks] percentage uncertainty = % Question 1 continues on the next page Turn over ► *03* Do not write outside the box IB/M/Jun23/7407/2 4 Figure 2 shows apparatus used to investigate how the frequency of stationary waves on a wire depends on its diameter d. Figure 2 When the signal generator is switched on, the horizontal part of the wire oscillates. A student changes the frequency until the first-harmonic stationary wave is produced. The student records the frequency f of the first harmonic and then turns off the signal generator. She removes the wire and measures d using a micrometer. She then repeats the experiment for wires of different diameter. 0 1 . 4 The wires used in the experiment are made of the same metal so that ρ is a control variable. State two other control variables in the experiment.