Please check the examination details below before entering your candidate information
Candidate surname Other names
Centre Number Candidate Number
Pearson Edexcel International Advanced Level
Thursday 29 May 2025
Afternoon (Time: 1 hour 45 minutes) Paper
reference WPH14/01
Physics
International Advanced Level
UNIT 4: Further Mechanics, Fields and Particles
You must have: Total Marks
Scientific calculator, ruler
Instructions:
•• Use black ink or ball-point pen.
If pencil is used for diagrams/sketches/graphs it must be dark (HB or B).
• Fill in the boxes at the top of this page with your name,
centre number and candidate number.
•• Answer all questions.
Answer the questions in the spaces provided
– there may be more space than you need.
• Show all your working out in calculations and include units where appropriate.
Information:
•• The total mark for this paper is 90.
The marks for each question are shown in brackets
– use this as a guide as to how much time to spend on each question.
• Instructure
the question marked with an asterisk (*), marks will be awarded for your ability to
your answer logically, showing how the points that you make are related or
follow on from each other where appropriate.
• The list of data, formulae and relationships is printed at the end of this booklet.
Advice:
•• Read each question carefully before you start to answer it.
Try to answer every question.
• Check your answers if you have time at the end. Turn over
P78756A
©2025 Pearson Education Ltd.
Y:1/1/1/
*P78756A0136*
, SECTION A
Answer ALL questions.
DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA
For questions 1–10, in Section A, select one answer from A to D and put a cross in the box .
If you change your mind, put a line through the box and then
mark your new answer with a cross .
1: An isotope of astatine has the symbol 213
85
At.
Which row of the table shows the number of protons and the number of neutrons in a
nucleus of this isotope?
Protons Neutrons
A 213 85
B 85 128
C 213 128
D 85 213
(Total for Question 1 = 1 mark)
2: A capacitor is charging. A graph of potential difference against charge is shown.
Potential difference
0
0 Charge
Which of the following gives the capacitance of the capacitor?
A The area between the line and the potential difference axis
B The area between the line and the charge axis
C The gradient of the line
D The inverse of the gradient of the line
(Total for Question 2 = 1 mark)
2
*P78756A0236*
, 3: A proton is in a vacuum. At a distance r from the proton, the electric field strength due
to the proton is 0.77 N C –1.
DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA
Which of the following gives the distance r, in m?
1.6 × 10 19
A
4π × 8.85 × 10 12 × 0.77
(1.6 × 10 19) 2
B
4π × 8.85 × 10 12 × 0.77
1.6 × 10 19
C
4π × 8.85 × 10 12 × 0.77
(1.6 × 10 19 ) 2
D
4π × 8.85 × 10 12 × 0.77
(Total for Question 3 = 1 mark)
4: In the upper atmosphere, high‑energy cosmic rays collide with molecules of air to
produce muons. The average speed of these muons is v.
The average lifetime of these muons is greater than the average lifetime of
stationary muons.
Which of the following gives the reason for this increase in average lifetime?
A v>c
B v=c
C v≈c
D v << c
(Total for Question 4 = 1 mark)
3
*P78756A0336* Turn over
, 5: In large‑angle alpha scattering experiments, alpha particles were directed at a thin metal
foil. The alpha particles were then detected at four positions, W, X, Y and Z, as shown.
DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA
W
X
alpha particles Y
metal foil Z
Where were most of the alpha particles detected?
A position W
B position X
C position Y
D position Z
(Total for Question 5 = 1 mark)
6: In an electron gun, a current heats a metal filament to release electrons.
Which of the following is the name of this process?
A beta decay
B ionisation
C photoelectric effect
D thermionic emission
(Total for Question 6 = 1 mark)
7: An electron and a positron collide and annihilate, producing two photons.
Which of the following is the energy, in joules, of one of these photons?
A 9.11 × 10–31 × (3 × 108)2
B 9.11 × 10–31 × 3 × 108
C 2 × 9.11 × 10–31 × (3 × 108)2
D 2 × 9.11 × 10–31 × 3 × 108
(Total for Question 7 = 1 mark)
4
*P78756A0436*
Candidate surname Other names
Centre Number Candidate Number
Pearson Edexcel International Advanced Level
Thursday 29 May 2025
Afternoon (Time: 1 hour 45 minutes) Paper
reference WPH14/01
Physics
International Advanced Level
UNIT 4: Further Mechanics, Fields and Particles
You must have: Total Marks
Scientific calculator, ruler
Instructions:
•• Use black ink or ball-point pen.
If pencil is used for diagrams/sketches/graphs it must be dark (HB or B).
• Fill in the boxes at the top of this page with your name,
centre number and candidate number.
•• Answer all questions.
Answer the questions in the spaces provided
– there may be more space than you need.
• Show all your working out in calculations and include units where appropriate.
Information:
•• The total mark for this paper is 90.
The marks for each question are shown in brackets
– use this as a guide as to how much time to spend on each question.
• Instructure
the question marked with an asterisk (*), marks will be awarded for your ability to
your answer logically, showing how the points that you make are related or
follow on from each other where appropriate.
• The list of data, formulae and relationships is printed at the end of this booklet.
Advice:
•• Read each question carefully before you start to answer it.
Try to answer every question.
• Check your answers if you have time at the end. Turn over
P78756A
©2025 Pearson Education Ltd.
Y:1/1/1/
*P78756A0136*
, SECTION A
Answer ALL questions.
DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA
For questions 1–10, in Section A, select one answer from A to D and put a cross in the box .
If you change your mind, put a line through the box and then
mark your new answer with a cross .
1: An isotope of astatine has the symbol 213
85
At.
Which row of the table shows the number of protons and the number of neutrons in a
nucleus of this isotope?
Protons Neutrons
A 213 85
B 85 128
C 213 128
D 85 213
(Total for Question 1 = 1 mark)
2: A capacitor is charging. A graph of potential difference against charge is shown.
Potential difference
0
0 Charge
Which of the following gives the capacitance of the capacitor?
A The area between the line and the potential difference axis
B The area between the line and the charge axis
C The gradient of the line
D The inverse of the gradient of the line
(Total for Question 2 = 1 mark)
2
*P78756A0236*
, 3: A proton is in a vacuum. At a distance r from the proton, the electric field strength due
to the proton is 0.77 N C –1.
DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA
Which of the following gives the distance r, in m?
1.6 × 10 19
A
4π × 8.85 × 10 12 × 0.77
(1.6 × 10 19) 2
B
4π × 8.85 × 10 12 × 0.77
1.6 × 10 19
C
4π × 8.85 × 10 12 × 0.77
(1.6 × 10 19 ) 2
D
4π × 8.85 × 10 12 × 0.77
(Total for Question 3 = 1 mark)
4: In the upper atmosphere, high‑energy cosmic rays collide with molecules of air to
produce muons. The average speed of these muons is v.
The average lifetime of these muons is greater than the average lifetime of
stationary muons.
Which of the following gives the reason for this increase in average lifetime?
A v>c
B v=c
C v≈c
D v << c
(Total for Question 4 = 1 mark)
3
*P78756A0336* Turn over
, 5: In large‑angle alpha scattering experiments, alpha particles were directed at a thin metal
foil. The alpha particles were then detected at four positions, W, X, Y and Z, as shown.
DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA DO NOT WRITE IN THIS AREA
W
X
alpha particles Y
metal foil Z
Where were most of the alpha particles detected?
A position W
B position X
C position Y
D position Z
(Total for Question 5 = 1 mark)
6: In an electron gun, a current heats a metal filament to release electrons.
Which of the following is the name of this process?
A beta decay
B ionisation
C photoelectric effect
D thermionic emission
(Total for Question 6 = 1 mark)
7: An electron and a positron collide and annihilate, producing two photons.
Which of the following is the energy, in joules, of one of these photons?
A 9.11 × 10–31 × (3 × 108)2
B 9.11 × 10–31 × 3 × 108
C 2 × 9.11 × 10–31 × (3 × 108)2
D 2 × 9.11 × 10–31 × 3 × 108
(Total for Question 7 = 1 mark)
4
*P78756A0436*
