AQA 2023 A-level PHYSICS 7408/3A Paper 3 Section A Question Paper + Mark scheme [MERGED] June 2023 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...
AQA 2023 A-level PHYSICS 7408/3A Paper 3 Section A Question Paper + Mark scheme [MERGED] June 2023
Please write clearly in block capitals.
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I declare this is my own work.
A-level
PHYSICS
Paper 3
Section A
Thursday 15 June 2023 Morning Time allowed: The total time for
Materials
both sections of this paper is
For this paper you must have: 2 hours. You are advised to
a pencil and a ruler spend approximately
a scientific calculator
a Data and Formulae Booklet 70 minutes on this section.
a protractor.
For Examiner’s Use
Instructions
Question Mark
Use black ink or black ball-point pen.
Fill in the boxes at the top of this page. 1
Answer all questions. 2
You must answer the questions in the spaces provided. Do not write 3
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 TOTAL
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 45.
You are expected to use a scientific calculator where appropriate.
A Data and Formulae Booklet is provided as a loose insert.
*JUN23740 3A01
IB/M/Jun23/E10 7408/3A
, 2
Do not write
outside the
Section A box
Answer all questions in this section.
0 1 A stroboscope emits bright flashes of white light.
The duration of each flash and the frequency of the flashes can be varied.
Table 1 shows information about the stroboscope.
Table 1
Minimum Maximum
Duration of each flash / μs 60 300
Frequency of flashes / Hz 1 150
The duration of each flash is T1.
The time from the start of a flash to the start of the next flash is T2.
T1
The duty cycle of a stroboscope is defined as .
T2
0 1 . 1 What is the maximum duty cycle of the stroboscope?
Tick (�) one box.
[1 mark]
6.0 × 10−5
3.0 × 10−4
9.0 × 10−3
4.5 × 10−2
*02*
IB/M/Jun23/7408/3A
, 3
Do not write
outside the
0 1 . 2 Figure 1 shows images produced in an experiment in which a bouncing ball is box
illuminated by a stroboscope.
The stroboscope flashes at a constant frequency.
Figure 1
Suggest why T1 must be very short for this experiment.
[1 mark]
Question 1 continues on the next page
Turn over ►
*03*
IB/M/Jun23/7408/3A
, 4
Do not write
outside the
box
Figure 2 shows the first six images starting with n = 0, where n is the image number.
Figure 2
The images are used to determine:
H, the vertical distance from the bottom of the ball to the floor when n = 0
h, the vertical distance from the bottom of the ball to the floor for each non-zero
value of n.
The n = N image is produced at the instant that the ball hits the floor for the first time.
For n between 0 and N it can be shown that
2
gn
un
H h = 0
f 2 f
where
u0 is the vertical velocity of the ball when n = 0
g is the acceleration due to gravity
f is the frequency of the flashes.
*04*
IB/M/Jun23/7408/3A
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