Wednesday 24 May 2023 Time allowed: 1 hour 30
minutes You are advised to
Afternoon spend about 35 minutes on
Materials Section C
For this paper you must have:
a pencil and a ruler
a scientific calculator For Examiner’s Use
a Data and Formulae Booklet Questio Mark
a protractor. n
1
Instructions 2
Use black ink or black ball-point pen.
3
Fill in the boxes at the top of this page.
Answer all questions. 4
You must answer the questions in the spaces provided. Do 5–34
not write outside the box around each page or on blank
TOTAL
pages.
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.
pg. 1
, You are expected to use a scientific calculator where appropriate.
A Data and Formulae Booklet is provided as a loose insert.
pg. 2
, 2
Do not write
Section A outside the
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 box
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 wire is given by
ρd 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
*03
IB/M/
* Jun23/7407/2
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