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Download Actual 2025 AQA A-level PHYSICS 7408/1 Paper 1 Merged Question Paper + Mark Scheme + Inse and more Exams Physics in PDF only on Docsity!
Please write clearly in block capitals. Centre number Candidate number Surname Forename(s) Candidate signature | declare this is my own work. A-level PHYSICS Paper 1 Friday 23 May 2025 Morning Time allowed: 2 hours Materials For this paper you must have: © apencil and a ruler * ascientific calculator ¢ a Data and Formulae Booklet ¢ a protractor. Instructions e Use black ink or black ball-point pen. Fill in the boxes at the top of this page. « Answer all questions. « You must answer the questions in the spaces provided. Do not write outside the box around each page or on blank pages. ¢ 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. e Show all your working. Information ¢ The marks for questions are shown in brackets. ¢ The maximum mark for this paper is 85. « You are expected to use a scientific calculator where appropriate. e A Data and Formulae Booklet is provided as a loose insert. For Examiner's Use Question Mark Nlolalaloel/rnia 9-33 TOTAL J 25740 8 01 1 IB/M/Jun25/G4006/E14 "7408/1 Do not write . outside the Section A box Answer all questions in this section. This question is about an isotope of titanium that only decays by electron capture. [o[4].[4] Complete Figure 1 to show the quark change that occurs during electron capture. Label the incoming and outgoing particles and the exchange particle. [3 marks] Figure 1 [0[1].[2] In some circumstances, a nucleus of this isotope can exist with no orbiting electrons. Explain why a neutral atom of this isotope is less stable than a nucleus that has no orbiting electrons. [1 mark] ll ll l ll tyrionpapers.com 02 IB/M/Jun25/7408/1 Do not write outside the [o[2].[1} State what is meant by a transverse wave. bok [2 marks] Figure 2 shows apparatus that is used to investigate stationary waves on a stretched wire. Figure 2 wire pulley > vibration generator y, variable-frequency ac supply A block of weight W is used to keep the wire under tension. The frequency of the ac supply is varied until a stationary wave is produced on the wire. [o[2].[2] Explain how a stationary wave is produced on the wire. [1 mark] IMAI — 04 IB/M/Jun25/7408/1 Do not write outside the [0[2].[3| Figure 3 shows a small section of the wire at one instant. Bo Five points on the wire are labelled P, to Ps. The dashed line represents the position of the wire when the ac supply is turned off. Figure 3 Describe how the phase of the oscillating particles varies along the wire between P, and Ps. [2 marks] Question 2 continues on the next page Turn over > MUN — 05 IB/M/Jun25/7408/1 A mass-spring system is undergoing simple harmonic motion (SHM). The maximum velocity of the mass is 0.39 m s! and the period of oscillation is 0.81 s. [o[3].[1] Draw, on Figure 4, a graph of acceleration against displacement for the system. Label each axis with a suitable unit and scale. [4 marks] Figure 4 [0[3].[2] Label, with a P, a point on your graph where the mass has 50% of its maximum kinetic energy. [1 mark] Turn over > IMM — 07 IB/M/Jun25/7408/1 Do not write outside the box Do not write outside the [0[4].[1] Explain why the Young modulus and the breaking stress of a wire have the same box SI unit. [1 mark] Table 1 contains data about four metal wires W, X, Y and Z. Table 1 Wire Length/m | Diameter/mm | Stiffness /Nm™ | Density / kg m™* WwW 3.10 1.7 4.90 x 104 2.71 x 103 x 2.17 1.4 5.25 x 104 1.93 x 104 Y 2.50 1.2 5.25 x 104 8.91 x 103 Zz 2.50 1.2 3.08 x 104 2.71 x 103 [0[4].[2 | The metal used to make wire X costs £75 per gram. Calculate, in £, the cost of wire X. [3 marks] cost= £ [0[4].[3 | State and explain which of the wires in Table 1 are made from the same material. [1 mark] ll | | ll tyrionpapers.com 08 IB/M/Jun25/7408/1 10 10 Do not write outside the This question is about the batteries used to store energy in electric vehicles. box Each battery is a series of modules. Each module is an array of identical cells. Table 2 shows the properties of one of these cells. Table 2 emf 3.66 V internal resistance 30.0 mQ maximum current 6.77A [o[5].[1] Calculate the terminal potential difference of the cell at its maximum current. [1 mark] terminal potential difference = Vv [0[5].[2| Figure 6 shows an array of 20 of these cells connected to form a module. Figure 6 module Calculate the internal resistance of the module shown in Figure 6. [2 marks] internal resistance = Q ill | l ll tyrionpapers.com 10 IB/M/Jun25/7408/1 11 11 Do not write outside the [0[5].[3| Figure 7 shows the battery for an electric vehicle. _ This battery has an emf of 352 V and gives a maximum current of 500 A. The battery consists of a series of identical modules. These modules are different from the module shown in Figure 6. Figure 7 - [, module battery The individual cells used in each module have the properties shown in Table 2. Deduce the number of cells in each module. [3 marks] number of cells = 6 Turn over > ill ll ll ll tyrionpapers.com 11 IB/M/Jun25/7408/1 13 [o[6].[3| A player jumps up to head a football when it is 2.0 m above the ground. The initial velocity of the ball is 18 ms at an angle of 48° to the horizontal. Figure 9 shows the path of the ball above horizontal ground. Figure 9 not to scale 2.0m horizontal ground Determine the time that the ball takes to reach the ground from the instant it leaves the player's head. Assume that the frictional forces acting on the ball are negligible. [3 marks] time = s Do not write outside the box Turn over for the next question Turn over > IM tyrionpapers.com IB/M/Jun25/7408/1 14 14 Do not write outside the A racing car of mass m travels around a horizontal oval track. The curved sections of bok the track are semicircles. [1] At the instant shown in Figure 10 the car is moving with constant speed v in a circle of radius R. Figure 10 not to scale The car has kinetic energy E,. The resultant force acting on the car is F. Show that R= oes, F [2 marks] The maximum centripetal force that can be produced between the car’s tyres and the track is 24 kN. The minimum value of R is 230 m. m= 1600 kg The car just starts to slip when it travels on the track in a circular path of radius 230 m. Deduce the speed of the car. [1 mark] speed = ms IML — 14 IB/M/Jun25/7408/1 16 16 [5] A car has a greater maximum speed on a sloped track than on a horizontal track of the same radius. Explain why. 2 xsl marks| Do not write outside the box INIT — 16 IB/M/Jun25/7408/1 17 17 Do not write outside the Electrons in a fluorescent tube are accelerated from rest by a potential difference _ of 130 V. [o[8].[1| Calculate the maximum speed of an electron that is accelerated from rest by this potential difference. [2 marks] maximum speed = ms [o[8].[2| Explain why the average speed of the electrons in the tube is much less than the maximum speed you calculated in Question 08.1. [1 mark] Question 8 continues on the next page Turn over > ill | ll ll tyrionpapers.com 17 IB/M/Jun25/7408/1 19 19 Do not write outside the [o[8].[4| Figure 12 shows a maximum intensity peak that occurs at wavelength peak: bass Calculate, in eV, the energy change of an atom that produces a photon with a wavelength ),.a4- [3 marks] energy change = eV 8 END OF SECTION A Turn over > | ll tyrionpapers.com 9 IB/M/Jun25/7408/1 Inn 20 20 Do not write . outside the Section B box Each of Questions 09 to 33 is followed by four responses, A, B, C and D. For each question select the best response. Only one answer per question is allowed. For each question, completely fill in the circle alongside the appropriate answer. CORRECT METHOD. je] WRONG METHODS | © | © || If you want to change your answer you must cross out your original answer as shown. Dx If you wish to return to an answer previously crossed out, ring the answer you now wish to select as shown. & You may do your working in the blank space around each question but this will not be marked. Do not use additional sheets for this working. The following equation represents a strong interaction between particle X and a proton. X+pont+7 What is the quark configuration of X? [1 mark] Awad [>] of ll | l ll tyrionpapers.com 20 IB/M/Jun25/7408/1 
