0 1 . 2 A metal wire of diameter d box is held in the gap between the anvil and the spindle.
Just before the reading of d is taken, the gap is closed using the ratchet and not the
thimble.
Explain why the gap is closed in this way.
[1 mark]
0 1 . 3 The mass per unit length μ of the metal wir...
Candidate signature
I declare this is my own work.
AS
PHYSICS
Paper 2
Wednesday 24 May 2023 Afternoon Time allowed: 1 hour 30 minutes
Materials
You are advised to spend about
For this paper you must have: 35 minutes on Section C
• a pencil and a ruler
• a scientific calculator For Examiner’s Use
• a Data and Formulae Booklet Question Mark
• a protractor.
1
Instructions 2
• Use black ink or black ball-point pen. 3
• Fill in the boxes at the top of this page.
4
• Answer all questions.
• You must answer the questions in the spaces provided. Do not write 5–34
outside the box around each page or on blank pages. TOTAL
• 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).
• 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 70.
• You are expected to use a scientific calculator where appropriate.
• A Data and Formulae Booklet is provided as a loose insert.
*JUN237407201*
IB/M/Jun23/E7 7407/2
, 2
Do not write
outside the
Section A box
Answer all questions in this section.
0 1 . 1 Figure 1 shows a micrometer screw gauge.
Figure 1
What is the reading on the micrometer?
Tick () one box.
[1 mark]
6.25
6.75
7.25
8.25
*02*
IB/M/Jun23/7407/2
, 3
Do not write
outside the
0 1 . 2 A metal wire of diameter d is held in the gap between the anvil and the spindle. box
Just before the reading of d is taken, the gap is closed using the ratchet and not the
thimble.
Explain why the gap is closed in this way.
[1 mark]
0 1 . 3 The mass per unit length μ of the metal wire is given by
πρd 2
μ=
4
where ρ is the density of the metal.
Values of d and μ are used to calculate ρ.
The percentage uncertainty in d is 1.2%.
The percentage uncertainty in μ is 2.0%.
Calculate the percentage uncertainty in the result for ρ.
[2 marks]
percentage uncertainty = %
Question 1 continues on the next page
Turn over ►
*03*
IB/M/Jun23/7407/2
, 4
Do not write
outside the
Figure 2 shows apparatus used to investigate how the frequency of stationary waves box
on a wire depends on its diameter d.
Figure 2
When the signal generator is switched on, the horizontal part of the wire oscillates.
A student changes the frequency until the first-harmonic stationary wave is produced.
The student records the frequency f of the first harmonic and then turns off the signal
generator.
She removes the wire and measures d using a micrometer.
She then repeats the experiment for wires of different diameter.
0 1 . 4 The wires used in the experiment are made of the same metal so that ρ is a control
variable.
State two other control variables in the experiment.
[2 marks]
1
2
*04*
IB/M/Jun23/7407/2
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