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*JUN25 74083 A01*
IB/M/Jun25/G4006/E15 7408/3A
For Examiner’s Use Question Mark 1 2 3 4 TOTAL
Tuesday 17 June 2025 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.• 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.Please write clearly in block capitals.Centre number
Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.A-level
PHYSICS
Paper 3 Section A
Time allowed: The total time for
both sections of this paper is
- hours. You are advised to
spend approximately 70 minutes on this section. 1 / 3
2
*02* IB/M/Jun25/7408/3 A
Do not write outside the box Section A
Answer all questions in this section.
- 1
This question is based on an investigation into how the frequency of the first-harmonic stationary wave on a string varies with tension (required practical activity 1).
Figure 1 shows the arrangement for this investigation.
Figure 1
The tension in the string is equal to the weight mg of the total mass m tied to the string.
The frequency is changed until the first-harmonic stationary wave appears on the string. This frequency f is determined using the oscilloscope.
The process is repeated for different values of m.
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3
*03* Turn over ►
IB/M/Jun25 /7408/3A
Do not write outside the box
- 1
. 1
Identify two control variables for the arrangement shown in Figure 1.
You may annotate Figure 1 as part of your answer.[2 marks]
1
2
- 1
. 2 The total mass m is made from a mass hanger and up to three slotted masses.
One 20 g, one 50 g and one 100 g slotted mass are provided.The hanger has a mass of 100 g.
The hanger must not be removed from the string.
Which statement is correct?
Tick () one box.[1 mark]
m has a maximum range of 170 g.
m has a maximum of 7 different values.
m values are evenly distributed across the range.
Question 1 continues on the next page
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