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AS PHYSICS Paper 2

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AS PHYSICS Paper 2 Wednesday 24 May 2023 Afternoon Materials For this paper you must have: • a pencil and a ruler • a scientific calculator • a Data and Formulae Booklet • a protractor. Instructions • Use black ink or black ball-point pen. • Fill in the boxes at the top of this page. • Answer all questions. Time allowed: 1 hour 30 minutes You are advised to spend about 35 minutes on Section C • You must answer the questions in the spaces provided. Do not write outside the box around each page or on blank 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. • You are expected to use a scientific calculator where appropriate. • A Data and Formulae Booklet is provided as a loose insert. 7407/2 Section A Answer all questions in this section. outside the box 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 0 1 . 2 A metal wire of diameter d 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 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 Turn over ► Figure 2 shows apparatus used to investigate how the frequency of stationary waves 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

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Aqa paper 2




Aqa
Please write clearly in block capitals.

Centre number Candidate number


Surname

Forename(s)

Candidate signature
I declare this is my own work.



AS
PHYSICS
Paper 2


Wednesday 24 May 2023 Time allowed: 1 hour 30
minutes You are advised to
Afternoon spend about 35 For
minutes on
Examiner’s Use

Materials Section C Question Mark
For this paper you must have: 1
 a pencil and a ruler
2
 a scientific calculator
 a Data and Formulae Booklet 3
 a protractor. 4
5–34
Instructions
TOTAL
 Use black ink or black ball-point pen.
 Fill in the boxes at the top of this page.
 Answer all questions.
 You must answer the questions in the spaces provided. Do not write  The marks for
outside the box around each page or on blank pages. questions are
 If you need extra space for your answer(s), use the lined pages at the end of shown in brackets.
this book. Write the question number against your answer(s).  The maximum
 Do all rough work in this book. Cross through any work you do not want mark for this paper
to be marked. is 70.
 Show all your working.  You are expected
to use a scientific
Information calculator where

Aqa paper 2

,Aqa paper 2
appropriate.
 A Data and Formulae Booklet is provided as a loose insert.




7407/2




Aqa paper 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

, 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

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




Turn over ►

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