ALEVELPAPERZZ2024
Please write clearly in block capitals.
Centre number Candidate number
24
Surname
Forename(s)
20
Candidate signature
I declare this is my own work.
A-level
ZZ
PHYSICS
Paper 1
R
PE
Friday 24 May 2024 Morning Time allowed: 2 hours
Materials For Examiner’s Use
A
For this paper you must have:
• a pencil and a ruler Question Mark
• a scientific calculator 1
LP
• a Data and Formulae Booklet 2
• a protractor.
3
Instructions 4
• Use black ink or black ball-point pen.
VE
5
• Fill in the boxes at the top of this page.
6
• Answer all questions.
• You must answer the questions in the spaces provided. Do not write 7
outside the box around each page or on blank pages. 8–32
• If you need extra space for your answer(s), use the lined pages at the end of
LE
this book. Write the question number against your answer(s). TOTAL
• Do all rough work in this book. Cross through any work you do not want
to be marked.
• Show all your working.
A
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.
, 2
Do not write
outside the
Section A box
Answer all questions in this section.
0 1 . 1 State the names of the four fundamental interactions.
[1 mark]
1
24
2
3
20
4
0 1 . 2
ZZ
State the products of the decay of a free neutron.
[1 mark]
0 1 . 3
R
Explain which of the fundamental interactions is responsible for the decay of the
neutron.
PE
[2 marks]
A
LP
0 1 . 4 The forces between two moving electrons cause their paths to change.
VE
Explain, using the concept of exchange particles, why the electron paths change.
[3 marks]
LE
A
7
, 3
Do not write
outside the
0 2 A positive pion collides with a neutron and the following interaction is observed: box
π+ + n → Κ + + Σ0
Σ0 is a neutral sigma particle with a strangeness of −1
The interaction can be used to deduce the classifications of the Σ0.
24
0 2 . 1 Identify the classifications of each particle in Table 1.
Tick () the appropriate boxes for each particle.
[2 marks]
Table 1
20
Particle Baryon Hadron Lepton Meson
ZZ
π+
n
R
PE
K+
Σ0
A
LP
0 2 . 2 A conservation rule predicts that the following interaction cannot occur:
π− + n → Κ − + Σ0
State the conservation rule.
VE
Go on to explain your answer.
[3 marks]
LE
A
Question 2 continues on the next page
Turn over ►
, 4
Do not write
outside the
box
One way in which neutral pions decay is
π0 → e− + e+ + γ
0 2 . 3 Compare the rest energies of the particles involved in this decay.
[2 marks]
24
20
0 2 . 4 The decay of the neutral pion leads to the production of further gamma photons.
ZZ
Explain why.
[1 mark]
R
PE
0 2 . 5 The Standard Model is a theory that classifies elementary particles.
Evidence for the theory has been collected since about 1950. However, the term
Standard Model has only been used since 1973.
A
Suggest why progress in particle physics is slow.
[1 mark]
LP
VE
9
LE
A
Please write clearly in block capitals.
Centre number Candidate number
24
Surname
Forename(s)
20
Candidate signature
I declare this is my own work.
A-level
ZZ
PHYSICS
Paper 1
R
PE
Friday 24 May 2024 Morning Time allowed: 2 hours
Materials For Examiner’s Use
A
For this paper you must have:
• a pencil and a ruler Question Mark
• a scientific calculator 1
LP
• a Data and Formulae Booklet 2
• a protractor.
3
Instructions 4
• Use black ink or black ball-point pen.
VE
5
• Fill in the boxes at the top of this page.
6
• Answer all questions.
• You must answer the questions in the spaces provided. Do not write 7
outside the box around each page or on blank pages. 8–32
• If you need extra space for your answer(s), use the lined pages at the end of
LE
this book. Write the question number against your answer(s). TOTAL
• Do all rough work in this book. Cross through any work you do not want
to be marked.
• Show all your working.
A
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.
, 2
Do not write
outside the
Section A box
Answer all questions in this section.
0 1 . 1 State the names of the four fundamental interactions.
[1 mark]
1
24
2
3
20
4
0 1 . 2
ZZ
State the products of the decay of a free neutron.
[1 mark]
0 1 . 3
R
Explain which of the fundamental interactions is responsible for the decay of the
neutron.
PE
[2 marks]
A
LP
0 1 . 4 The forces between two moving electrons cause their paths to change.
VE
Explain, using the concept of exchange particles, why the electron paths change.
[3 marks]
LE
A
7
, 3
Do not write
outside the
0 2 A positive pion collides with a neutron and the following interaction is observed: box
π+ + n → Κ + + Σ0
Σ0 is a neutral sigma particle with a strangeness of −1
The interaction can be used to deduce the classifications of the Σ0.
24
0 2 . 1 Identify the classifications of each particle in Table 1.
Tick () the appropriate boxes for each particle.
[2 marks]
Table 1
20
Particle Baryon Hadron Lepton Meson
ZZ
π+
n
R
PE
K+
Σ0
A
LP
0 2 . 2 A conservation rule predicts that the following interaction cannot occur:
π− + n → Κ − + Σ0
State the conservation rule.
VE
Go on to explain your answer.
[3 marks]
LE
A
Question 2 continues on the next page
Turn over ►
, 4
Do not write
outside the
box
One way in which neutral pions decay is
π0 → e− + e+ + γ
0 2 . 3 Compare the rest energies of the particles involved in this decay.
[2 marks]
24
20
0 2 . 4 The decay of the neutral pion leads to the production of further gamma photons.
ZZ
Explain why.
[1 mark]
R
PE
0 2 . 5 The Standard Model is a theory that classifies elementary particles.
Evidence for the theory has been collected since about 1950. However, the term
Standard Model has only been used since 1973.
A
Suggest why progress in particle physics is slow.
[1 mark]
LP
VE
9
LE
A
