Exam (elaborations)
AQA A-level PHYSICS 7408/3BE Paper 3 Section B Electronics June 2024 QP
- Module
- Institution
AQA A-level PHYSICS 7408/3BE Paper 3 Section B Electronics June 2024 QP
[Show more]
Seller
Follow
Papersbyyamak
Reviews received
Content preview
Please write clearly in block capitals.Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
A-level
PHYSICS
Paper 3
Section B Electronics
Monday 17 June 2024 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 50 minutes on this section.
• a protractor.
For Examiner’s Use
Instructions
• Use black ink or black ball-point pen. Question Mark
• 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
outside the box around each page or on blank pages. 3
• If you need extra space for your answer(s), use the lined pages at the end of 4
this book. Write the question number against your answer(s). 5
• Do all rough work in this book. Cross through any work you do not want
to be marked. TOTAL
• Show all your working.
Information
• 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.
*JUN2474083BE01*
IB/M/Jun24/E8 7408/3BE 1
, 2
Do not write
outside the
Section B box
Answer all questions in this section.
0 1 A toy manufacturer is designing a two-tone siren for use in small battery-operated
cars.
Figure 1 shows design Option 1.
Option 1 uses three separate signal generators feeding into a logic sub-system.
The signal generators produce logic-compatible 9 V square waves of frequencies
1024 Hz, 1 Hz and 512 Hz.
Figure 1
The waveforms shown are not to scale.
0 1 . 1 Explain how the logic level applied at B in Figure 1 determines the output frequency
at Q.
[2 marks]
0 1 . 2 Write the Boolean algebra expression for output Q in terms of the inputs A, B and C.
Use only the logic operations shown in Figure 1.
[2 marks]
Q=
*02*
IB/M/Jun24/7408/3BE 2
, 3
Do not write
outside the
0 1 . 3 Option 1 is tested by replacing the 1 Hz signal generator with a manual input. box
The manual input is provided by the combination of a push-to-make switch
and a 10 kΩ resistor.
The combination produces the following voltages at its output:
• 0 V when the switch is not pressed
• 9 V when the switch is pressed.
Figure 2 shows the symbol for the push-to-make switch.
Figure 2
Complete Figure 3 to show how this switch and the 10 kΩ resistor are connected.
Label the output Vout.
You do not need to add details taken from Figure 1.
[1 mark]
Figure 3
Question 1 continues on the next page
Turn over ►
*03*
IB/M/Jun24/7408/3BE 3
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Papersbyyamak. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for £10.59. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
75632 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy revision notes and other study material for 14 years now