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Download Actual 2024 AQA AS PHYSICS 7407/1 Paper 1 Merged Question Paper + Mark Scheme + Insert Ac and more Exams Physics in PDF only on Docsity!
Actual 2024 AQA AS PHYSICS 7407/1 Paper 1 Merged Question Paper + Mark Scheme + “AOA a Please write clearly in block capitals. Centre number Candidate number Surname Forename(s) Candidate signature | declare this is my own work. AS PHYSICS Paper 1 Wednesday 15 May 2024 Morning Time allowed: 1 hour 30 minutes Materials _, For this paper you must have: nelle Ellin Wee © a pencil and a ruler Question | Mark * ascientific calculator ¢ a Data and Formulae Booklet l © a protractor. 2 3 Instructions 4 e Use black ink or black ball-point pen. Fill in the boxes at the top of this page. 2 e Answer all questions. 6 « You must answer the questions in the spaces provided. Do not write TOTAL outside the box around each page or on blank pages. e 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 70. « You are expected to use a scientific calculator where appropriate. « A Data and Formulae Booklet is provided as a loose insert. LL Do not write outside the Answer all questions in the spaces provided. ‘box An electron neutrino interacts with a chlorine-37 nucleus to produce an argon-37 nucleus and an electron. The interaction is represented by the equation: 37 37 v. + 7c! > ig +e [o[1|.[1] Explain, with reference to appropriate conservation laws, why the electron is emitted in this interaction. [2 marks] [0[1|.[2] Calculate the specific charge of the argon-37 nucleus. [2 marks] specific charge = Ckg? 02 IB/M/Jun24/7407/1 2 Do not write outside the [0] 1].[4] The argon-37 nucleus decays into a stable nucleus. box 04 Describe the nature of the forces that act between nucleons and how these forces can maintain nuclear stability. In your answer, describe: ¢ the forces of repulsion and attraction that act between nucleons « exchange particles associated with these forces the role of these forces in keeping the nucleus stable. [6 marks] IB/M/Jun24/7407/1 4 Do not write outside the box Turn over > IB/M/Jun24/7407/1 5 Do not write outside the [o[2].[3] The experiment is repeated with a different gas. Bo Figure 2 shows the three lowest energy levels for an atom of the gas. Figure 2 not to scale —3.16 eV —_—___. energy level B —4.96 eV OO energy level A —21.56 eV ____ ground state When an electron in the beam collides with the gas atom, 18.4 eV of energy is transferred to the atom. The atom subsequently emits a photon of visible light. State and explain the energy transitions that are involved. Support your answer with appropriate calculations. [4 marks] Turn over > INI IB/M/Jun24/7407/1 7 Do not write outside the box There are no questions printed on this page DO NOT WRITE/ON THIS PAGE ANSWER IN THE/SPACES PROVIDED INN IB/M/Jun24/7407/1 8 10 The sound produced by the guitar is analysed. The sound is the superposition of the first harmonic f, with harmonics f,, f,, f, and f; of the stationary waves that exist on the string. Figure 4 shows the frequencies of these harmonics and their relative amplitudes. Figure 4 A relative amplitude _) 0 200 400 600 800 frequency / Hz [o|3|.[3] Draw, on Figure 5, the stationary wave that produces the harmonic f,. Label the positions of all nodes N and all antinodes A. [3 marks] Figure 5 INIA IB/M/Jun24/7407/1 Do not write outside the box 10 INIA [o[3|.[4] The string is vibrating freely. The player then touches the string lightly at its midpoint Z as shown in Figure 6. This prevents the string from vibrating at Z. The sections XZ and ZY of the string continue to vibrate. Figure 6 x, 324 mm Y L 324mm _! | —=SF r i i | 7, | The sound produced by the guitar is analysed. Deduce, with reference to frequency, how the harmonics present in this sound compare with the harmonics present in Figure 4. [3 marks] Do not write outside the box Turn over for the next question Turn over > IB/M/Jun24/7407/1 11 13 The car and trailer accelerate from rest along a horizontal road. Figure 8 shows: « that the car exerts a horizontal force P, on the trailer « that the trailer has a weight of 2500 N « the reaction force R on the wheels of the trailer. Figure 8 1 oO: 2500 N [o|4].[2] Initially, there are no resistive forces and the trailer accelerates at 1.5 ms. INIA Calculate the initial value of P,,. Question 4 continues on the next page [2 marks] Turn over > IB/M/Jun24/7407/1 Do not write outside the box 13 14 Do not write outside the Air resistance D acts on the trailer when it is moving. D increases as the velocity v of box. the trailer increases. Figure 9 shows how D varies with v. Figure 9 3500 3000 +- cH 2500 2000 DIN | 1500+ <4 — 1000 $00 +- +H ° wnt 10 15 20 25 v/ms! Figure 10 shows the forces acting on the trailer when it is travelling at a constant horizontal velocity. The car exerts a vertical force P,, and a horizontal force P,, on the trailer when it is travelling at a constant horizontal velocity v,. An enlarged view of P,, and P,; is also shown in Figure 10. Figure 10 1 oy 2500 N The horizontal force P,; is now greater than the value calculated in Question 04.2. INIA 4 IB/MiJun24/7407/1 14 16 Do not write outside the box [o|4].[5| When the car and trailer travel with velocity v,, Py, is zero. Determine v,. [3 marks] [0 [4 ].[6| The air resistance D acting on the trailer increases as the velocity v of the trailer increases. Explain this increase in D with reference to the momentum of the air displaced by the trailer. You should also refer to appropriate Newton's laws of motion. [3 marks] 16 IB/M/Jun24/7407/1 16 17 Do not write outside the The car has a maximum power output of 95 kW. _ The maximum velocity of the car and trailer is 25 ms}. At this velocity, the force D on the trailer is 3100 N. The car exerts a horizontal force P,; on the trailer and the trailer exerts an equal and opposite force of magnitude P,, on the car. Assume that air resistance and P,, are the only resistive forces acting on the car. Calculate the air resistance acting on the car when it is travelling at a constant velocity of 25mst. [3 marks] air resistance on car = N|| 17 Turn over for the next question Turn over > 17 IB/M/Jun24/7407/1 17 19 Do not write outside the [o[5|.[1] The current in L, is increased from 0 to 0.50 A. box The potential difference V across L, is 0.375 V when Jis 0.50 A. Draw, on Figure 14, a V—J graph for L, in the current range 0 to 0.50 A. [1 mark] Figure 14 0.3755 0.2505 Vi 0.1255 0 T 1 0 0.25 0.50 T/A [0] 5|.[2 | Calculate the power dissipated in L; when Jis 1.9 A. [2 marks] power dissipated = WwW Question 5 continues on page 21 Turn over > Ml 9 IB/MiJun24/7407/4 19 Inn 20 Do not write outside the box There are no questions printed on this page DO NOT WRITE/ON THIS PAGE ANSWER IN THE/SPACES PROVIDED INA IB/MiJun24/7407/1 20 
