AQA_2024: A-level Physics - Paper 2 (Merged Question Paper and Marking Scheme)

AQA_2024: A-level Physics - Paper 2
(Merged Question Paper and Marking Scheme)


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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:
 a pencil and a ruler Question Mark
 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.
 You must answer the questions in the spaces provided. Do not write 7
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
this book. Write the question number against your answer(s). TOTAL
 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.

,For A-Level Physics Paper 2, focus on the following key areas:

1. Mechanics and Materials:

 Forces and Motion: Understand Newton's laws of motion, equations of motion (suvat equations), and
the conservation of momentum in collisions (elastic and inelastic).
 Work, Energy, and Power: Know the work-energy principle, calculate kinetic and potential energy, and
understand the concept of power as the rate of energy transfer (P = W/t).
 Circular Motion: Study centripetal force, centripetal acceleration, and the conditions for circular
motion (e.g., satellites and vehicles in curves).
 Elasticity and Hooke’s Law: Understand the relationship between force and extension in elastic
materials and calculate the Young’s modulus.

2. Electricity:

 Current, Voltage, and Resistance: Master Ohm's law (V = IR) and understand how current, voltage,
and resistance interact in both series and parallel circuits.
 Power in Circuits: Know how to calculate power in an electrical circuit (P = IV, P = I²R).
 Capacitance: Study the relationship between charge, voltage, and capacitance (Q = CV), and the time
constant for charging and discharging capacitors in RC circuits.
 Electric Fields: Understand electric field strength, the relationship between field strength and potential,
and the force on a charge in an electric field.

3. Waves:

 Wave Properties: Know the key characteristics of waves: wavelength, frequency, amplitude, and wave
speed. Understand the equation v=fλv = f\lambdav=fλ.
 Wave Behavior: Study refraction, diffraction, interference, and superposition of waves. Understand
standing waves and the formation of resonant frequencies.

4. Thermal Physics:

 Temperature and Heat: Understand the kinetic theory of gases, and how temperature and pressure
are related for ideal gases (PV = nRT).
 Specific Heat Capacity: Study the heat required to change temperature (Q = mcΔT), and understand
latent heat during phase changes (Q = mL).

5. Nuclear Physics:

 Radioactivity: Understand the properties of alpha, beta, and gamma radiation, and the concept of half-
life.
 Nuclear Fission and Fusion: Study the processes of nuclear fission (used in nuclear reactors) and
nuclear fusion (energy from stars), including the energy released in these processes.

6. Practical Skills:

 Experimental Techniques: Focus on key practical techniques such as data collection, error analysis, and
uncertainty calculation. Practice interpreting experimental data and drawing appropriate conclusions.
 Graphical Analysis: Be comfortable with plotting graphs, analyzing trends, and calculating gradients.
Understand how to use graphical methods to derive physical quantities.




IB/M/Jun24/E11 7408/2

, 2
Do not
Do not write
write
outside the
outside the
Section A box
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




IB/M/Jun24/7408/2

, 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]




heat energy removed = J 9



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IB/M/Jun24/7408/2