aqa
Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
A-level
PHYSICS
Paper 2
Thursday 6 June 2024 Morning Time allowed: 2 hours
Materials For Examiner’s Use
For this paper you must have:
Question Mark
a pencil and a ruler
a scientific calculator 1
a Data and Formulae Booklet 2
a protractor. 3
Instructions 4
Use black ink or black ball-point pen. 5
Fill in the boxes at the top of this page. 6
Answer all questions.
7
You must answer the questions in the spaces provided. Do not write
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 TOTAL
this book. Write the question number against your answer(s).
Do all rough work in this book. Cross through any work you do not want
to be marked.
Show all your working.
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.
7408/2
, 2
Do not write
outside the
Section A box
Answer all questions in this section.
0 1 A room contains dry air at a temperature of 20.0 °C and a pressure of 105 kPa.
0 1 . 1 Show that the amount of air in each cubic metre is about 40 mol.
[1 mark]
0 1
. 2 The density of the dry air is 1.25 kg m−3.
Calculate crms for the air molecules.
Give your answer to an appropriate number of significant figures.
[3 marks]
crms = m s−1
0 1 . 3 Calculate, in K, the change of temperature that will double crms for the air molecules.
[2 marks]
change of temperature = K
verified
, 3
Do not write
outside the
0 1 . 4 A room contains moist air at a temperature of 20 °C. box
A dehumidifier cools and then condenses water vapour from the moist air.
The final temperature of the liquid water that collects in the dehumidifier is 10 °C.
Drier air leaves the dehumidifier at a temperature of 20 °C.
Table 1 compares the air flowing into and out from the dehumidifier.
Table 1
mass of water
mass of air
moist air flowing in 0.0057
drier air flowing out 0.0037
In one hour, a volume of 960 m3 of air flows through the dehumidifier.
Assume that the density of the air remains constant at 1.25 kg m−3.
Determine how much heat energy is removed in one hour from the water vapour by
the dehumidifier.
specific heat capacity of water vapour = 1860 J kg−1 K−1
specific latent heat of vaporisation of water = 2.3 × 106 J kg−1
[3 marks]
9
heat energy removed = J
Turn over ►
verified
, 4
Do not write
outside the
0 2 Figure 1 shows a circuit used to charge capacitor C. box
The battery has negligible internal resistance.
Figure 1
The capacitance of C is known.
0 2
. 1 The switch is closed at time t = 0 and the potential difference VC across C is recorded
at different times t.
Figure 2 shows the variation of VC with t.
Figure 2
Explain how a gradient of the graph in Figure 2 can be used to determine the initial
current I0 in the circuit.
[2 marks]
verified
Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
A-level
PHYSICS
Paper 2
Thursday 6 June 2024 Morning Time allowed: 2 hours
Materials For Examiner’s Use
For this paper you must have:
Question Mark
a pencil and a ruler
a scientific calculator 1
a Data and Formulae Booklet 2
a protractor. 3
Instructions 4
Use black ink or black ball-point pen. 5
Fill in the boxes at the top of this page. 6
Answer all questions.
7
You must answer the questions in the spaces provided. Do not write
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 TOTAL
this book. Write the question number against your answer(s).
Do all rough work in this book. Cross through any work you do not want
to be marked.
Show all your working.
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.
7408/2
, 2
Do not write
outside the
Section A box
Answer all questions in this section.
0 1 A room contains dry air at a temperature of 20.0 °C and a pressure of 105 kPa.
0 1 . 1 Show that the amount of air in each cubic metre is about 40 mol.
[1 mark]
0 1
. 2 The density of the dry air is 1.25 kg m−3.
Calculate crms for the air molecules.
Give your answer to an appropriate number of significant figures.
[3 marks]
crms = m s−1
0 1 . 3 Calculate, in K, the change of temperature that will double crms for the air molecules.
[2 marks]
change of temperature = K
verified
, 3
Do not write
outside the
0 1 . 4 A room contains moist air at a temperature of 20 °C. box
A dehumidifier cools and then condenses water vapour from the moist air.
The final temperature of the liquid water that collects in the dehumidifier is 10 °C.
Drier air leaves the dehumidifier at a temperature of 20 °C.
Table 1 compares the air flowing into and out from the dehumidifier.
Table 1
mass of water
mass of air
moist air flowing in 0.0057
drier air flowing out 0.0037
In one hour, a volume of 960 m3 of air flows through the dehumidifier.
Assume that the density of the air remains constant at 1.25 kg m−3.
Determine how much heat energy is removed in one hour from the water vapour by
the dehumidifier.
specific heat capacity of water vapour = 1860 J kg−1 K−1
specific latent heat of vaporisation of water = 2.3 × 106 J kg−1
[3 marks]
9
heat energy removed = J
Turn over ►
verified
, 4
Do not write
outside the
0 2 Figure 1 shows a circuit used to charge capacitor C. box
The battery has negligible internal resistance.
Figure 1
The capacitance of C is known.
0 2
. 1 The switch is closed at time t = 0 and the potential difference VC across C is recorded
at different times t.
Figure 2 shows the variation of VC with t.
Figure 2
Explain how a gradient of the graph in Figure 2 can be used to determine the initial
current I0 in the circuit.
[2 marks]
verified
