2025 OCR A Level Physics A H556/01 Modelling physics Combined Question Paper &
Final Marking Scheme
Oxford Cambridge and RSA
Friday 23 May 2025 – Morning
A Level Physics A
H556/01 Modelling physics
Time allowed: 2 hours 15 minutes
*1888786527*
You must have:
• the Data, Formulae and Relationships Booklet
You can use:
• a scientific or graphical calculator
• a ruler (cm/mm)
* H 5 5 6 0 1 *
Please write clearly in black ink. Do not write in the barcodes.
Centre number Candidate number
First name(s)
Last name
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 100.
• The marks for each question are shown in brackets [ ].
• Quality of extended response will be assessed in questions marked with an asterisk (*).
• This document has 36 pages.
ADVICE
• Read each question carefully before you start your answer.
© OCR 2025 [601/4743/X] OCR is an exempt Charity
DC (SL/SG) 354822/5 Turn over
, 2
Section A
You should spend a maximum of 30 minutes on this section.
Write your answer to each question in the box provided.
1 Which of these physical constants requires the greatest number of different base SI units?
A Avogadro constant, NA
B Boltzmann constant, k
C Gravitational constant, G
D Molar gas constant, R
Your answer
[1]
2 A metal block of mass m is at temperature T0. An electrical heater of constant power P heats the
block for time t and it reaches a temperature T1. The overall efficiency of the process is x.
Which expression gives the correct value of c, specific heat capacity of the block?
Pt
A
m(T1 – T0)
Pt
B
mx(T1 – T0)
Ptx
C
m(T1 – T0)
Px
D
mt(T1 – T0)
Your answer
[1]
© OCR 2025
, 3
3 Which row of the table describes the conditions which apply to an inelastic collision?
Kinetic energy Total energy Momentum
A Conserved Not conserved Conserved
B Not conserved Conserved Conserved
C Not conserved Conserved Not conserved
D Not conserved Not conserved Not conserved
Your answer
[1]
4 A light rod is hung from a horizontal ceiling using 2 springs, one attached to each end. The
springs have force constants k and 2k.
A downwards force F is applied closer to one end of the rod such that the rod is horizontal.
What is the tension T in the spring with the force constant 2k?
T
force force
constant 2k constant k
T
rod
F
F
A
3
F
B
2
2F
C
3
D F
Your answer
[1]
© OCR 2025 Turn over
, 4
5 A material is heated so that it changes state from solid to liquid and after further heating changes
to gas.
Which of the following properties of the particles have increased?
1 Mean kinetic energy
2 Order
3 Spacing
A 1 and 3 only
B 1, 2 and 3
C 2 and 3 only
D 3 only
Your answer
[1]
© OCR 2025
Final Marking Scheme
Oxford Cambridge and RSA
Friday 23 May 2025 – Morning
A Level Physics A
H556/01 Modelling physics
Time allowed: 2 hours 15 minutes
*1888786527*
You must have:
• the Data, Formulae and Relationships Booklet
You can use:
• a scientific or graphical calculator
• a ruler (cm/mm)
* H 5 5 6 0 1 *
Please write clearly in black ink. Do not write in the barcodes.
Centre number Candidate number
First name(s)
Last name
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 100.
• The marks for each question are shown in brackets [ ].
• Quality of extended response will be assessed in questions marked with an asterisk (*).
• This document has 36 pages.
ADVICE
• Read each question carefully before you start your answer.
© OCR 2025 [601/4743/X] OCR is an exempt Charity
DC (SL/SG) 354822/5 Turn over
, 2
Section A
You should spend a maximum of 30 minutes on this section.
Write your answer to each question in the box provided.
1 Which of these physical constants requires the greatest number of different base SI units?
A Avogadro constant, NA
B Boltzmann constant, k
C Gravitational constant, G
D Molar gas constant, R
Your answer
[1]
2 A metal block of mass m is at temperature T0. An electrical heater of constant power P heats the
block for time t and it reaches a temperature T1. The overall efficiency of the process is x.
Which expression gives the correct value of c, specific heat capacity of the block?
Pt
A
m(T1 – T0)
Pt
B
mx(T1 – T0)
Ptx
C
m(T1 – T0)
Px
D
mt(T1 – T0)
Your answer
[1]
© OCR 2025
, 3
3 Which row of the table describes the conditions which apply to an inelastic collision?
Kinetic energy Total energy Momentum
A Conserved Not conserved Conserved
B Not conserved Conserved Conserved
C Not conserved Conserved Not conserved
D Not conserved Not conserved Not conserved
Your answer
[1]
4 A light rod is hung from a horizontal ceiling using 2 springs, one attached to each end. The
springs have force constants k and 2k.
A downwards force F is applied closer to one end of the rod such that the rod is horizontal.
What is the tension T in the spring with the force constant 2k?
T
force force
constant 2k constant k
T
rod
F
F
A
3
F
B
2
2F
C
3
D F
Your answer
[1]
© OCR 2025 Turn over
, 4
5 A material is heated so that it changes state from solid to liquid and after further heating changes
to gas.
Which of the following properties of the particles have increased?
1 Mean kinetic energy
2 Order
3 Spacing
A 1 and 3 only
B 1, 2 and 3
C 2 and 3 only
D 3 only
Your answer
[1]
© OCR 2025
