Edexcel IAL · Physics · WPH12 · Electric Circuits

Topic Questions: 80 understand how changes of resistance with illumination may be modelled in terms of the number of conduction electrons and understand how to apply this model to LDRs. — WPH12 Electric Circuits

8 WPH12 Electric Circuits topic questions are tagged to this syllabus point across 8 papers (2019–2026). Only the parts whose knowledge graph matches this syllabus statement are counted, and the table shows which parts of each question are involved.

8 topic questions 8 papers 22 tagged marks 3.0% of topic questions 3.5% of topic marks 2019–2026 Syllabus 2018–current

All WPH12 Electric Circuits topic questions All paper codes

Core finding

This Electric Circuits syllabus point appears in 8 WPH12 papers across 2019–2026, contributing 8 topic questions and 22 marks. The most recent appearance is WPH12/01 January 2026. That equals 3.0% of the 268 topic questions and 3.5% of the 634 marks tagged to Electric Circuits. Only parts tagged to this subtopic are counted, so a four-part question can contribute one item and one part's marks. The table lists every matching question, its tagged parts and marks, with a link back to the paper page. Sessions are newest first, so the statement can be traced back through the full paper history.

Topic questions by session

Newest sessions first. Parts and marks count only the parts tagged to this subtopic; “x of y parts” shows how much of the question is tagged elsewhere. Select the paper cell to open the matching question on the paper page, or use Go to Practice Hub to answer that exact question in the Interactive Practice Hub.

Paper	Question	Type	Parts	Marks	Difficulty	Practice
WPH12/01January 2026 · Edexcel IAL	Q4 LDR Circuits - Edexcel IAL Physics Jan 2026 Q4	MCQ	MCQ · 1 part	1	Medium	Go to Practice Hub
WPH12/01January 2025 · Edexcel IAL	Q16 LDR Potential Divider and Voltmeter Reading - Edexcel IAL Physics Jan 2025 Q16	FRQ	1 of 2 parts ((b))	6 of 7 on the paper	Easy	Go to Practice Hub
WPH12/01January 2024 · Edexcel IAL	Q2 LDR Characteristics - Edexcel IAL Physics Jan 2024 Q2	MCQ	MCQ · 1 part	1	Easy	Go to Practice Hub
WPH12/01June 2023 · Edexcel IAL	Q14 LDR Potential Divider Circuit - Edexcel IAL Physics May 2023 Q14	FRQ	1 part	6	Medium	Go to Practice Hub
WPH12/01June 2022 · Edexcel IAL	Q9 Conduction Electrons in LDR - Edexcel IAL Physics June 2022 Q9	MCQ	MCQ · 1 part	1	Easy	Go to Practice Hub
WPH12/01January 2022 · Edexcel IAL	Q10 LDR and Potential Divider Circuit Behavior - Edexcel IAL Physics Jan 2022 Q10	MCQ	MCQ · 1 part	1	Medium	Go to Practice Hub
WPH12/01January 2021 · Edexcel IAL	Q13 LDR Resistance Investigation - Edexcel IAL Physics Jan 2021 Q13	FRQ	1 of 2 parts ((b))	2 of 4 on the paper	Medium	Go to Practice Hub
WPH12/01June 2019 · Edexcel IAL	Q15 Resistor Combinations and Potential Divider Circuits - Edexcel IAL Physics May 2019 Q15	FRQ	1 of 4 parts ((c)(ii))	4 of 13 on the paper	Medium	Go to Practice Hub

Related topic questions in Electric Circuits

64 understand that electric current is the rate of flow of charged particles and be able to use the equation $I = \frac{Δ Q}{Δ t}$ 17 question items · 15 papers 39 marks · 2019–2026 65 understand how to use the equation $V = \frac{W}{Q}$ 17 question items · 13 papers 31 marks · 2019–2026 66 understand that resistance is defined by $R = \frac{V}{I}$ and that Ohm's law is a special case when $I \propto V$ for constant temperature 20 question items · 14 papers 55 marks · 2020–2026 67a understand how the distribution of current in a circuit is a consequence of charge conservation 12 question items · 10 papers 32 marks · 2020–2025 67b understand how the distribution of potential differences in a circuit is a consequence of energy conservation 13 question items · 10 papers 34 marks · 2020–2025 68 be able to derive the equations for combining resistances in series and parallel using the principles of charge and energy conservation, and be able to use these equations 39 question items · 20 papers 118 marks · 2019–2026

Topic question rules and edge cases

How many topic questions cover this syllabus point?: 8 question stems cover this subtopic across 8 papers, but only 8 tagged parts and 22 marks belong to it. Other parts of the same questions are assessed under different statements and are excluded from this page.
Which papers include this subtopic?: The table lists every matching session from 2019–2026. Each row links to the question anchor on the paper page, where the full paper context and practice entry point are available.
Why can one question appear under several subtopics?: The parts of one question can assess different syllabus statements. Each part is counted under its own subtopics, so the same question stem can appear on several subtopic pages while each page lists only the parts and marks tagged to that statement.
Can I practise these questions with AI marking?: Yes. Open a paper from the table and use the Interactive Practice Hub entry point. The page itself is static HTML so search engines and retrieval agents can read the full question list without executing JavaScript.