Oxford Cambridge and RSA - 2025
Wednesday 14 May 2025 – Morning
AS Level Physics A
H156/01 Breadth in physics
Time allowed: 1 hour 30 minutes
(Verified Question Paper With Mark
Scheme Combined June 2025)
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2025 OCR AS Level Physics A H156/01 Breadth in physics, Exams of Physics
2025 OCR AS Level Physics A H156/01 Breadth in physics Time allowed: 1 hour 30 minutes (Verified Question Paper With Mark Scheme Combined June 2025) INSTRUCTIONS •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] DC (DE/SW) 356248/3 OCR is an exempt Charity Turn over Section A You should spend a maximum of 25 minutes on this section. W
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Oxford Cambridge and RSA - 2025
Wednesday 14 May 2025 – Morning
AS Level Physics A
H156/01 Breadth in physics
Time allowed: 1 hour 30 minutes
(Verified Question Paper With Mark
Scheme Combined June 2025)
INSTRUCTIONS
- 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] DC (DE/SW) 356248/ OCR is an exempt Charity (^) Turn over
© OCR 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 –6^ m B 10 –8^ m C 10 –10^ m D 10 –12^ 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–1. Calculate the frequency of the wave. A 160 Hz B 240 Hz C 350 Hz
© OCR D 710 Hz Your answer [1]
© OCR Turn over 9 The Young modulus of a material is 2.1 × 109 Pa. What is 2.1 × 109 Pa numerically equal to? A 2.1 GPa B 2.1 kPa C 2.1 MPa D 2.1 TPa Your answer [1] 10 An object floats in a liquid. A force of upthrust acts on the object. Which quantity does not affect the magnitude of the upthrust? A density of the liquid B gravitational field strength C mass of the object D volume of the object Your answer [1] 11 An object, initially at rest, falls from a height of 4.5 m above the ground. Assume that air resistance is negligible. Calculate the speed of the object when it is 2.5 m above the ground. A 4.4 m s– B 6.3 m s– C 7.0 m s– D 9.4 m s– Your answer [1]
© OCR 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. 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]
N
N
θ
F
© OCR 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 time 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]
B
C
A D
© OCR Turn over 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. 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]
A
© OCR Turn over
BLANK PAGE
DO NOT WRITE ON THIS PAGE
© OCR 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. scales (a) When the lift is stationary, W = R. Discuss whether these two forces form a force pair according to Newton’s third law. ............................................................................................................................................ .............. ............................................................................................................................................ .............. ............................................................................................................................................ .............. ............................................................................................................................................ .............. ............................................................................................................................................ .............. .................................................................................................................................. [3]
W
R
© OCR 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. ............................................................................................................................................ .............. ............................................................................................................................................ .............. ............................................................................................................................................ .............. ............................................................................................................................................
© OCR Turn over
.................................................................................................................................. [3]
© OCR Turn over refractive index =................................................ [2]
© OCR 23 Some information about a microwave oven is shown in the table. Frequency of microwaves / GHz 2. Input voltage / V 230 Input current / A 5 Output power / W 700 (a) Calculate the percentage efficiency of the microwave oven. percentage efficiency = ..................................................... % [3] (b) The microwave oven is used to heat some soup. The internal energy of the soup needs to increase by 100 kJ to reach the correct temperature for eating. The soup packet claims that the soup should be heated for at least 3 minutes. Deduce whether the claim is correct. [3]