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2024 AQA A-Level PHYSICS 7408/3A Paper 3 Section A Verified Question Paper and Marking S, Exams of Physics

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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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 Morning
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.
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.
Show all your working.
Information
The marks for questions are shown in brackets.
The maximum mark for this paper is 45.
You are expected to use a scientific calculator where appropriate.
A Data and Formulae Booklet is provided as a loose insert.
For Examiner’s Use
Question
Mark
1
2
3
TOTAL
pf3
pf4
pf5
pf8
pf9
pfa
pfd
pfe
pff
pf12
pf13
pf14
pf15
pf16
pf17
pf18
pf19
pf1a
pf1b
pf1c
pf1d
pf1e
pf1f
pf20
pf21
pf22
pf23
pf24
pf25
pf26
pf27
pf28
pf29
pf2a
pf2b
pf2c
pf2d
pf2e
pf2f
pf30
pf31
pf32
pf33
pf34
pf35
pf36
pf37
pf38
pf39
pf3a
pf3b
pf3c

Partial preview of the text

Download 2024 AQA A-Level PHYSICS 7408/3A Paper 3 Section A Verified Question Paper and Marking S and more Exams Physics in PDF only on Docsity!

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 Morning

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.

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.
  • Show all your working.

Information

  • The marks for questions are shown in brackets.
  • The maximum mark for this paper is 45.
  • You are expected to use a scientific calculator where appropriate.
  • A Data and Formulae Booklet is provided as a loose insert.

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.

Clips are used to connect a voltmeter across the 1.2 Ω resistor. When the switch is

closed, the voltmeter reading is 931 mV.

The switch is then opened and the voltmeter is connected to X as shown in Figure 4. Figure 4

Do not write outside the

0 1. 4 When the switch is closed, the voltmeter reading is 397 mV.^ box

Show that, for the arrangement in Figure 4 , the resistance R of the wire between the clips is about 0.5 Ω.

[2 marks] Question 1 continues on the next page Turn over ►

Do not write outside the

. 6 Table 1 shows the resistance per metre of various metal wires.

The diameter of X is one of the values of d shown in Table 1.

Table 1 box

Resistance per metre of wire / Ω m−^1

d / mm copper tungsten alumel nichrome

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]

metal used for X =

resistivity = SI unit =

Question 1 continues on the next page Turn over ►

Do not write outside the

0 1. 7 A student adds error bars for R and L to each point on Figure 5.^ box

She estimates that

  • each value of R has a percentage uncertainty of 6%
  • each value of L has an absolute uncertainty of 5 mm.

Compare her error bars for the point at L = 209 mm with her error bars for the point

at L = 388 mm.

[2 marks]

Do not write outside the

Figure 6 shows apparatus used to investigate how the resistance R of^ box

a light-dependent resistor (LDR) varies with illumination. Figure 6 The ohm-meter

  • always displays a four-digit reading of R
  • can be set to the different ranges A to E shown in Table 2. Table 2 Setting Maximum reading displayed Minimum (non-zero) reading displayed Unit

range A 199.9 000.1 Ω

range B 1999 0001 Ω

range C 19.99 00.01 kΩ

range D 199.9 000.1 kΩ

range E 1.999 0.001 MΩ

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]

0 2. 2 The quantity E

V is^ a^ measure^ of^ the^ intensity^ of the^ light^ incident on^ the^ LDR.

The SI unit of E V is the lux (lx).

The resistance R of the LDR is given by

log( R / Ω) = −0.772 log( E V / lx) + 5.

Show that E V for the arrangement shown in Figure 6 is about 130 lx.

[2 marks] Question 2 continues on the next page Turn over ►

Do not write outside the

It can be shown that E  1^ box

V

x^2

. 3 Describe a method to show that Figure 7 confirms this relationship. You do not need to show any calculations. [2 marks]

0 2. 4 Deduce the value of x when E

V =^130 lx.

[2 marks]

x = mm

Question 2 continues on the next page Turn over ►

Do not write outside the

0 2. 5 R is measured when x = 450 mm.^ box

Figure 8 shows how the ohm-meter displays the values of R when set to range B and

when set to range C. Figure 8

The uncertainty of the reading on the ohm-meter is ±2% of the displayed reading

plus ±2 in the least significant digit.

This means that:

  • using range B the maximum value of R is 1.02 × 1681 + 2 = 1717 Ω
  • using range C the minimum value of R is 0.98 × 1.68 – 0.02 = 1.63 kΩ.

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.

R is recorded with different numbers of slides placed on the LDR.

E V is calculated for each value of R.

. 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

0 2. 8 In an experiment μ = 9.0 × 10 −^2

Deduce the minimum number of slides needed to reduce E V by 50%.

[2 marks]

number of slides =^15

(^0 2). 7 For the arrangement in Figure 9 it can be shown that

E V = 400 e− μN

where N is the number of slides

μ is a constant.

Explain how μ can be determined from a linear graph.

[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]