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OCR AS LEVEL
PHYSICS A
2O25 OCR AS Level Physics A H156/
Breadth in physics
Verified Question paper with Marking
Scheme combined
INSTRUCTIONS
Candidate number
- Use black ink. You can use an HB pencil,
but only for graphs and diagrams.
- Write your answer to each question in
the space provided. If you need extra space use
the lined pages at the end of this booklet. The
question numbers must be clearly shown.
- Answer all the questions.
- Where appropriate, your answer should
be supported with working. Marks might be
given for using a correct method, even if your
answer is wrong.
INFORMATION
- The total mark for this paper is 70.
- The marks for each question are shown
in brackets [ ].
- This document has 24 pages.
ADVICE
- Read each question carefully before you
start your answer
Oxford Cambridge and RSA
Wednesday 14 May 2025 – Morning
AS Level Physics A
H156/01 Breadth in physics
Time allowed: 1 hour 30 minutes
You must have:
- the Data, Formulae and Relationships Booklet
You can use:
- a scientific or graphical calculator
- a ruler (cm/mm)
- an HB pencil
Please write clearly in black ink. Do not write in the barcodes.
Centre number
First name(s)
Last name
INSTRUCTIONS
Candidate number
- Use black ink. You can use an HB pencil, but only for graphs and diagrams.
- Write your answer to each question in the space provided. If you need extra space use the lined
pages at the end of this booklet. The question numbers must be clearly shown.
- Answer all the questions.
- Where appropriate, your answer should be supported with working. Marks might be given
for using a correct method, even if your answer is wrong.
INFORMATION
- The total mark for this paper is 70.
- The marks for each question are shown in brackets [ ].
- This document has 24 pages.
ADVICE
- Read each question carefully before you start your answer.
© OCR 2025 [601/4742/8] OCR is an exempt Charity
DC (DE/SW) 356248/3 Turn over
3 Four resistors, each of resistance 10 Ω, are connected in a network, as shown.
X Y
What is the total resistance between points X and Y?
A 2.5 Ω
B 10 Ω
C 25 Ω
D 40 Ω
Your answer [1]
4 Which is a possible wavelength of ultraviolet radiation?
A 10
m B
m C
m D
m
Your answer [1]
5 The diagram shows a sound wave in an open pipe of length 1.4 m.
1.4 m
The speed of the wave is 330 m s
Calculate the frequency of the wave. A
160 Hz
B 240 Hz C
350 Hz D
710 Hz
Your answer [1]
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6 Electromagnetic radiation with frequency of 2.2 × 10
Hz is incident on a clean metal surface. The
work function of the metal is 3.7 eV. Photoelectrons are emitted from the surface of the metal.
Calculate the maximum kinetic energy of the photoelectrons.
A 5.9 × 10
J B
8.7 × 10
J C 1.
× 10
J D 2.1 ×
J
Your answer [1]
7 The velocity of an electron is 5% of the speed of light in a vacuum.
Calculate the wavelength of the electron.
A 1.3 × 10
m B
2.6 × 10
m C
2.4 × 10
m D
4.9 × 10
m
Your answer [1]
8 The stress-strain graphs for four materials A , B , C and D are shown.
stress
B
A
C
D
strain
Which material has the greatest ultimate tensile strength?
Your answer [1]
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12 Electromagnetic radiation is incident on the surface of a clean metal sheet. The frequency of the
radiation is greater than the threshold frequency of the metal. Photoelectrons are released from the
surface.
Which of the following quantities affects the rate of emission of photoelectrons? A
the intensity of the radiation
B the thickness of the metal sheet
C the threshold frequency of the metal D
the work function of the metal
Your answer [1]
13 A free-body force diagram is shown below. The system is in equilibrium.
F
θ
6.0 N
5.0 N
Calculate the magnitude of the force F and the angle θ.
F / N θ / °
A 7.8 40
B 7.8 50
C 11 40
D 11 50
Your answer [1]
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16 A ball is thrown upwards from a height 1 m above the ground. It rises to maximum height, then falls
to the ground and bounces once, rises and falls back down to the ground.
The velocity-time graph for this motion is shown below.
velocity A D
C
time
B
During which section of the graph does the ball experience the greatest rate of change of
momentum?
Your answer [1]
17 A ball is hit by a racket. The graph shows how the force on the ball changes whilst the racket is in contact
with the ball.
force / N
time / ms
Which is the best estimate of the total impulse on the ball?
A 0.20 N s
B 0.24 N s
C 0.48 N s
D 0.50 N s
Your answer [1]
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18 A cell with an e.m.f. of 1.50 V and internal resistance of 0.50 Ω is connected to a resistor of
resistance 20 Ω. An ammeter is connected in series.
A
Calculate the reading on the ammeter.
A 30 mA
B 31 mA
C 73 mA
D 75 mA
Your answer (^) [1]
19 A current flows through a resistor.
Which is a correct definition for the power dissipated in the resistor?
A energy transferred from electrical energy to other forms of energy per unit charge B
energy transferred from electrical energy to other forms of energy per unit time C energy
transferred from other forms of energy to electrical energy per unit charge D energy
transferred from other forms of energy to electrical energy per unit time
Your answer (^) [1]
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BLANK PAGE
DO NOT WRITE ON THIS PAGE
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Section B
21 A student stands on a set of scales while travelling in a lift. The scales are calibrated in newtons. When
the lift is stationary the scales read 700 N.
The diagram shows the two forces acting on the student, the normal contact force R and the weight
W.
R
scales
W
(a) When the lift is stationary, W = R. Discuss whether these two forces form a force pair according to
Newton’s third law.
..................................................................................................................................................... [3]
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22 A scientist takes measurements to identify a piece of glass.
(a) They measure the refractive index of the glass using the following procedure:
1 Submerge the glass in a clear liquid with a known refractive index.
2 If the glass is not visible when submerged in the liquid, conclude that the refractive index of the glass
is equal to the refractive index of the liquid.
3 Otherwise, clean the glass and return to the first step using a liquid with a different refractive index.
(i) Suggest why the scientist must clean the glass in step 3.
..................................................................................................................................................... [1]
(ii) Suggest one other factor that the scientist needs to control.
..................................................................................................................................................... [1]
(b) The table shows the refractive index n for three different types of glass.
Type of glass Refractive index, n
X 1.47 < n < 1.
Y 1.49 < n < 1.
Z 1.51 < n < 1.
The scientist measures the refractive index of the piece of glass as 1.52 ± 1.5%.
They conclude that the glass is type Z.
Evaluate this conclusion.
..................................................................................................................................................... [3]
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(c) A student makes measurements to determine the refractive index of a liquid by measuring the critical
angle.
(i) Describe what critical angle means.
..................................................................................................................................................... [1]
(ii) The student pours liquid into a shallow, semicircular glass dish.
Refraction due to the thin glass walls of the dish can be ignored.
liquid
dish
Describe how the student could accurately measure the critical angle using a ray box.
You may draw diagrams to support your answer.
..................................................................................................................................................... [4]
(iii) The student measures the critical angle as 42°.
Calculate the refractive index of the liquid.
refractive index = ......................................................... [2]
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(c) The soup packet advises that the soup should be stirred halfway through heating to ensure it is heated
evenly.
The microwave oven heats the soup unevenly because stationary waves are formed inside the
microwave oven.
(i) Explain how stationary waves are formed inside the microwave oven.
..................................................................................................................................................... [2]
(ii) Explain why the formation of stationary waves causes the soup to be heated unevenly.
..................................................................................................................................................... [2]
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24 The figure shows a device used to increase the strength of finger muscles.
spring
handle
When a force F is applied to the handle, the system is maintained in equilibrium by a tension T in the
spring and a reaction force R acting at the pivot.
1.5 cm (^) T
pivot
A
F
Not to scale
4.5 cm
R
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