Exam (elaborations)
AQA A-level PHYSICS Paper 3 Section B Electronics QP JUNE 2023
AQA A-level PHYSICS Paper 3 Section B Electronics QP JUNE 2023
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A-level PHYSICS
Paper 3 AQA A-level PHYSICS Paper 3 Section B Electronics QP JUNE 2023
Section B Electronics
Thursday 15 June 2023 Morning Time allowed: The total time for
both sections of this paper is 2
Materials
For this paper you must have: hours. You are advised to spend
• a pencil and a ruler approximately 50
• a scientific calculator
minutes on this section.
• a Data and Formulae Booklet • a protractor.
, 2
Do not write
outside the
box
For Examiner’s Use
Instructions
• Use black ink or black ball-point pen.
• Fill in the boxes at the top of this page. Question Mark
• Answer all questions. 1
• You must answer the questions in the spaces provided. Do not write outside the
box around each page or on blank pages. 2
• 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). 3
• Do all rough work in this book. Cross through any work you do not want to be
marked. 4
• Show all your working.
5
Information
TOTAL
• The marks for questions are shown in brackets.
• The maximum mark for this paper is 35.
• You are expected to use a scientific calculator where appropriate.
• A Data and Formulae Booklet is provided as a loose insert.
*JUN2374083BE01* IB/M/Jun23/E9 7408/3BE
Section B
Answer all questions in this section.
0 1 Figure 1 shows the input and output pins for a 4-bit binary counter. The output pin for
the least significant bit is A.
Figure 1
IB/M/Jun23/7408/3BE
, 3
Do not write outside the
box
0 1
.1
Complete Figure 1 by adding a single logic gate to the binary counter so that the
circuit functions as a modulo-6 counter.
[2 marks]
Figure 2 shows three outputs of the modulo-6 counter connected to a logic sub-
system that controls a 7-segment display.
The decimal point on the display is not shown.
The whole system shown in Figure 2 is to be used as an electronic dice.
Figure 2
Segments in the 7-segment display are turned on or off by the logic sub-system to
display the decimal numbers 1 to 6 in sequence.
A segment in the display turns on when the logic output with the same letter as the
segment is at logic 1.
*02*
Logic inputs Logic outputs
C B A a b c d e f g
Turn over ►
IB/M/Jun23/7408/3BE
, 4
Do not write
outside the
box
0 0 0 0 1 1 0 0 0 0
0 0 1 1 1 0 1 1 0 1
0 1 0 1 1 1 1 0 0 1
0 1 1 0 1 1 0 0 1 1
1 0 0 1 0 1 1 0 1 1
1 0 1 1 0 1 1 1 1 1
0 1
0 1
IB/M/Jun23/7408/3BE
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