AQA SUMMER 2026
PREDICTED PAPER
Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signatuure
I declare this is my own work.
A-level
PHYSICS WORKED SOLUTIONS
Paper 3
Section B Electronics
Time allowed: The total time for
both sections of this paper is
Materials 2 hours. You are advised to
For this paper you must have: spend approximately 70 minutes
• a pencil and a ruler
on this section.
• a scientific calculator
• a Data and Formulae Booklet
• a protractor
Instructions
• Use black ink or black ball-point pen. For Examiner’s Use
• Fill in the boxes at the top of this page.
• Answer all questions. Question Mark
• You must answer the questions in the spaces provided. Do not write 1
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
3
this book. Write the question number against your answer(s).
• Show all your working. 4
• Do all rough work in this book. Cross through any work you do not want TOTAL
to be marked.
Information
• The marks for the 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.
for more: tyrionpapers.com
7408/3BE
, 2
Do not write
outside the
Section B box
Answer all questions in the spaces provided.
0 1 MOSFETs are widely used as electronic switches in modern circuits due to their
efficiency and versatility. A student is investigating the operation of an n-channel
MOSFET. Figure 1 shows the internal structure of an n channel MOSFET with its
terminals labelled.
Figure 1
0 1 . 1 Explain what is meant by a depletion zone in a p-n junction and describe its electrical
behaviour.
[3 marks]
for more: tyrionpapers.com
, Figure 2 shows the characteristic graph of the MOSFET input.
Figure 2
The MOSFET has a threshold voltage Vth = 2.0 V and is connected to a supply
voltage of 9 V. The gate voltage VGS is increased from 0 V.
0 1 . 2 State what happens to the drain-source current IDS when VGS is below Vth.
Explain your answer.
[2 marks]
for more: tyrionpapers.com
PREDICTED PAPER
Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signatuure
I declare this is my own work.
A-level
PHYSICS WORKED SOLUTIONS
Paper 3
Section B Electronics
Time allowed: The total time for
both sections of this paper is
Materials 2 hours. You are advised to
For this paper you must have: spend approximately 70 minutes
• a pencil and a ruler
on this section.
• a scientific calculator
• a Data and Formulae Booklet
• a protractor
Instructions
• Use black ink or black ball-point pen. For Examiner’s Use
• Fill in the boxes at the top of this page.
• Answer all questions. Question Mark
• You must answer the questions in the spaces provided. Do not write 1
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
3
this book. Write the question number against your answer(s).
• Show all your working. 4
• Do all rough work in this book. Cross through any work you do not want TOTAL
to be marked.
Information
• The marks for the 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.
for more: tyrionpapers.com
7408/3BE
, 2
Do not write
outside the
Section B box
Answer all questions in the spaces provided.
0 1 MOSFETs are widely used as electronic switches in modern circuits due to their
efficiency and versatility. A student is investigating the operation of an n-channel
MOSFET. Figure 1 shows the internal structure of an n channel MOSFET with its
terminals labelled.
Figure 1
0 1 . 1 Explain what is meant by a depletion zone in a p-n junction and describe its electrical
behaviour.
[3 marks]
for more: tyrionpapers.com
, Figure 2 shows the characteristic graph of the MOSFET input.
Figure 2
The MOSFET has a threshold voltage Vth = 2.0 V and is connected to a supply
voltage of 9 V. The gate voltage VGS is increased from 0 V.
0 1 . 2 State what happens to the drain-source current IDS when VGS is below Vth.
Explain your answer.
[2 marks]
for more: tyrionpapers.com
