2025 AQA A-LEVEL PHYSICS Paper 1 Question Paper & Mark
Scheme (Merged) Friday 23 May 2025 [VERIFIED]
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 1
Friday 23 May 2025 Morning Time allowed: 2 hours
Materials
For this paper you must have: For Examiner’s Use
a pencil and a ruler Question Mark
a scientific calculator
1
a Data and Formulae Booklet
a protractor. 2
3
Instructions
4
Use black ink or black ball-point pen.
Fill in the boxes at the top of this page. 5
Answer all questions. 6
You must answer the questions in the spaces provided. Do not write 7
outside the box around each page or on blank pages.
8
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). 9–33
Do all rough work in this book. Cross through any work you do not want TOTAL
to be marked.
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.
A Data and Formulae Booklet is provided as a loose insert.
7408/1
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IB/M/Jun25/G4006/E14
, 2
Do not write
outside the
Section A box
Answer all questions in this section.
0 1 This question is about an isotope of titanium that only decays by electron capture.
0 1 . 1 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]
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IB/M/Jun25/7408/1
, 3
Do not write
outside the
0 1 . 3 box
A nucleus of this isotope of titanium has a proton number of 22 and a specific charge
of 4.8 × 107 C kg−1.
Determine the number of neutrons in this nucleus.
[2 marks]
number of neutrons = 6
Turn over for the next question
Turn over ►
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IB/M/Jun25/7408/1
, 4
Do not write
outside the
box
0 2 . 1 State what is meant by a transverse wave.
[2 marks]
Figure 2 shows apparatus that is used to investigate stationary waves on a
stretched wire.
Figure 2
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.
0 2 . 2 Explain how a stationary wave is produced on the wire.
[1 mark]
tyrionpapers.com
IB/M/Jun25/7408/1
Scheme (Merged) Friday 23 May 2025 [VERIFIED]
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 1
Friday 23 May 2025 Morning Time allowed: 2 hours
Materials
For this paper you must have: For Examiner’s Use
a pencil and a ruler Question Mark
a scientific calculator
1
a Data and Formulae Booklet
a protractor. 2
3
Instructions
4
Use black ink or black ball-point pen.
Fill in the boxes at the top of this page. 5
Answer all questions. 6
You must answer the questions in the spaces provided. Do not write 7
outside the box around each page or on blank pages.
8
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). 9–33
Do all rough work in this book. Cross through any work you do not want TOTAL
to be marked.
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.
A Data and Formulae Booklet is provided as a loose insert.
7408/1
tyrionpapers.com
IB/M/Jun25/G4006/E14
, 2
Do not write
outside the
Section A box
Answer all questions in this section.
0 1 This question is about an isotope of titanium that only decays by electron capture.
0 1 . 1 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]
tyrionpapers.com
IB/M/Jun25/7408/1
, 3
Do not write
outside the
0 1 . 3 box
A nucleus of this isotope of titanium has a proton number of 22 and a specific charge
of 4.8 × 107 C kg−1.
Determine the number of neutrons in this nucleus.
[2 marks]
number of neutrons = 6
Turn over for the next question
Turn over ►
tyrionpapers.com
IB/M/Jun25/7408/1
, 4
Do not write
outside the
box
0 2 . 1 State what is meant by a transverse wave.
[2 marks]
Figure 2 shows apparatus that is used to investigate stationary waves on a
stretched wire.
Figure 2
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.
0 2 . 2 Explain how a stationary wave is produced on the wire.
[1 mark]
tyrionpapers.com
IB/M/Jun25/7408/1
