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2024 AQA A-Level PHYSICS 7408/3A Paper 3 Section A Verified Question Paper and Marking Scheme Attached June 2024 PHYSICS Paper 3 Section A Monday 17 June 2024 Materials For this paper you must have: • a pencil and a ruler • a scientific calculator • a Data and Formulae Booklet • a protractor. Instructions • Use black ink or black ball-point pen. • Fill in the boxes at the top of this page. • Answer all questions. Morning Time allowed: The total time for both sections of this paper is 2 hours. You are advised to spend approximately 70 minutes on this section. • 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.
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Verified Question Paper and Marking Scheme Attached June 2024
Section A Monday 17 June 2024 Morning
For this paper you must have:
sections of this paper is 2 hours. You are advised to spend approximately 70 minutes on this section.
box around each page or on blank pages.
the question number against your answer(s).
For Examiner’s Use Question Mark 1 2 3 TOTAL
Do not write outside the Section A box Answer all questions in this section. (^0 1) This question is based on a method to determine the resistivity of a wire (required practical activity 5). Figure 1 shows a micrometer screw gauge. Figure 1 Figure 2 shows an enlarged view of the scales. Figure 2
Do not write outside the Figure 3 shows a circuit used to determine the resistance per metre of wire X.^ box Figure 3 Two terminals are used to mount X on a ruler.
The switch is then opened and the voltmeter is connected to X as shown in Figure 4. Figure 4
Do not write outside the
[2 marks] Question 1 continues on the next page Turn over ►
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. 6 Table 1 shows the resistance per metre of various metal wires.
Table 1 box
Identify the metal used for X. Go on to determine the resistivity of the metal. State an appropriate SI unit for your answer. [4 marks]
Question 1 continues on the next page Turn over ►
Do not write outside the
She estimates that
[2 marks]
Do not write outside the
a light-dependent resistor (LDR) varies with illumination. Figure 6 The ohm-meter
Do not write outside the (^0 2). 1 Explain why the reading displayed in Figure 6 shows that the ohm-meter is set box to range C. [1 mark]
V is^ a^ measure^ of^ the^ intensity^ of the^ light^ incident on^ the^ LDR.
[2 marks] Question 2 continues on the next page Turn over ►
Do not write outside the
V
. 3 Describe a method to show that Figure 7 confirms this relationship. You do not need to show any calculations. [2 marks]
[2 marks]
Question 2 continues on the next page Turn over ►
Do not write outside the
when set to range C. Figure 8
This means that:
Do not write outside the Figure 9 shows the LDR being used to investigate the transmission of light through^ box glass slides. Figure 9 The lamp and ohm-meter are switched on.
. 6 The positions of the lamp and the LDR are not changed during the experiment. Identify two other control variables. [2 marks] 1 2
Do not write outside the box
[2 marks]
(^0 2). 7 For the arrangement in Figure 9 it can be shown that
[2 marks] Turn over ►
Do not write outside the (^0 3). 1 Describe a method to show that the copper rod is horizontal. box Your method must include the use of a metre ruler. You may annotate Figure 10. [3 marks] Question 3 continues on the next page Turn over ►
Do not write outside the Figure 11 shows the copper rod positioned above a digital balance.^ box Two identical magnets are mounted on a steel yoke with their opposite poles facing each other. The balance is zeroed. The yoke is then placed on the balance so that a horizontal uniform magnetic field is applied perpendicular to the copper rod. The ends of the rod are connected as shown. Figure 11 0 3
. 2 When the switch is open, the reading on the balance shows the mass of the yoke and the two magnets. When the switch is closed, the reading on the balance decreases. Explain, with reference to Figure 11 , the direction of the horizontal magnetic field. [3 marks]