AQA A-LEVEL PHYSICS Paper 3 Section A (7408/3A) Combined Question
Paper and Mark Scheme
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 3
Section A
Time allowed: The total time for
both sections of this paper is
Materials
For this paper you must have:
2 hours. You are advised to
• a pencil and a ruler spend approximately
• a scientific calculator 70 minutes on this section.
• a Data and Formulae Booklet
• a protractor.
Instructions For Examiner’s Use
• Use black ink or black ball-point pen.
Question Mark
• Fill in the boxes at the top of this page.
• Answer all questions. 1
• You must answer the questions in the spaces provided. Do not write 2
outside the box around each page or on blank pages. 3
• 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). 4
IB/M/Jun25/G4006/E15
• Do all rough work in this book. Cross through any work you do not want TOTAL
to be marked.
• Show all your working.
Information
• The marks for questions are shown in brackets.
• The maximum mark for this paper is 45.
• You are expected to use a scientific calculator where appropriate.
• A Data and Formulae Booklet is provided as a loose insert.
, 2
Do not write
outside the
Section A box
Answer all questions in this section.
0 1 This question is based on an investigation into how the frequency of the first-harmonic
stationary wave on a string varies with tension (required practical activity 1).
Figure 1 shows the arrangement for this investigation.
Figure 1
The tension in the string is equal to the weight mg of the total mass m tied to
the string.
The frequency is changed until the first-harmonic stationary wave appears on the
string. This frequency f is determined using the oscilloscope.
The process is repeated for different values of m.
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IB/M/Jun25/7408/3A
, 3
Do not write
outside the
0 1 . 1 Identify two control variables for the arrangement shown in Figure 1. box
You may annotate Figure 1 as part of your answer.
[2 marks]
1
2
0 1 . 2 The total mass m is made from a mass hanger and up to three slotted masses.
One 20 g, one 50 g and one 100 g slotted mass are provided.
The hanger has a mass of 100 g.
The hanger must not be removed from the string.
Which statement is correct?
Tick (✓) one box.
[1 mark]
m has a maximum range of 170 g.
m has a maximum of 7 different values.
m values are evenly distributed across the range.
Question 1 continues on the next page
Turn over ►
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IB/M/Jun25/7408/3A
, 4
Do not write
outside the
box
The frequency f is calculated using the waveform displayed on the oscilloscope.
Figure 2 shows the waveforms displayed on the oscilloscope when m = 100 g and
when m = 200 g.
Figure 2
m = 100 g
m = 200 g
The y-voltage gain setting is 5 V div−1.
The time-base setting is 20 ms div−1.
for more: tyrionpapers.com
IB/M/Jun25/7408/3A
Paper and Mark Scheme
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 3
Section A
Time allowed: The total time for
both sections of this paper is
Materials
For this paper you must have:
2 hours. You are advised to
• a pencil and a ruler spend approximately
• a scientific calculator 70 minutes on this section.
• a Data and Formulae Booklet
• a protractor.
Instructions For Examiner’s Use
• Use black ink or black ball-point pen.
Question Mark
• Fill in the boxes at the top of this page.
• Answer all questions. 1
• You must answer the questions in the spaces provided. Do not write 2
outside the box around each page or on blank pages. 3
• 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). 4
IB/M/Jun25/G4006/E15
• Do all rough work in this book. Cross through any work you do not want TOTAL
to be marked.
• Show all your working.
Information
• The marks for questions are shown in brackets.
• The maximum mark for this paper is 45.
• You are expected to use a scientific calculator where appropriate.
• A Data and Formulae Booklet is provided as a loose insert.
, 2
Do not write
outside the
Section A box
Answer all questions in this section.
0 1 This question is based on an investigation into how the frequency of the first-harmonic
stationary wave on a string varies with tension (required practical activity 1).
Figure 1 shows the arrangement for this investigation.
Figure 1
The tension in the string is equal to the weight mg of the total mass m tied to
the string.
The frequency is changed until the first-harmonic stationary wave appears on the
string. This frequency f is determined using the oscilloscope.
The process is repeated for different values of m.
for more: tyrionpapers.com
IB/M/Jun25/7408/3A
, 3
Do not write
outside the
0 1 . 1 Identify two control variables for the arrangement shown in Figure 1. box
You may annotate Figure 1 as part of your answer.
[2 marks]
1
2
0 1 . 2 The total mass m is made from a mass hanger and up to three slotted masses.
One 20 g, one 50 g and one 100 g slotted mass are provided.
The hanger has a mass of 100 g.
The hanger must not be removed from the string.
Which statement is correct?
Tick (✓) one box.
[1 mark]
m has a maximum range of 170 g.
m has a maximum of 7 different values.
m values are evenly distributed across the range.
Question 1 continues on the next page
Turn over ►
for more: tyrionpapers.com
IB/M/Jun25/7408/3A
, 4
Do not write
outside the
box
The frequency f is calculated using the waveform displayed on the oscilloscope.
Figure 2 shows the waveforms displayed on the oscilloscope when m = 100 g and
when m = 200 g.
Figure 2
m = 100 g
m = 200 g
The y-voltage gain setting is 5 V div−1.
The time-base setting is 20 ms div−1.
for more: tyrionpapers.com
IB/M/Jun25/7408/3A
