Pearson Edexcel International GCSE in Physics · 4PH1 · Free · no account needed
Electromagnetic Induction — exam questions
10 original Incandio exam-style questions on Electromagnetic Induction, 24 marks, about 24 minutes of writing. Each one carries the command word, the tariff and the specification statement it assesses, exactly as a paper presents them. This is an original Incandio practice question, written to reflect the structure and demands of the qualification. It is not an official Pearson Edexcel past-paper question.
This is the practice set for Electromagnetic Induction — the lesson that teaches it. Read the lesson first if the idea is new; come here when you want to find out whether you can turn it into marks. Completely free, no account needed to read.
What these questions ask of you
7 command words run through this set, and on Pearson Edexcel International GCSE Physics each one means something precise. Answering the wrong command is the commonest way a candidate who understands the lesson still loses the mark.
- Which (1 mark)
- one option chosen from the set given
- State (1 mark)
- one precise fact or definition
- Give (1–2 marks)
- a short factual answer
- Explain (2–4 marks)
- the physics that causes it, set out as a line of reasoning Misread as: describing the change without giving the physical reason for it
- Describe (2–4 marks)
- developed, linked statements of what happens — including a named direction where one exists
- Compare (2–4 marks)
- explicit comparison naming both cases
- Suggest (1–3 marks)
- a plausible answer applying taught physics to an unfamiliar arrangement
Assessed on Paper 1 (4PH1/1P) and Paper 2 (4PH1/2P), against AO1, AO2, AO3.
Where these sit in the specification
Pearson Edexcel International GCSE Physics (4PH1) — statements 6.15 · 6.16. Incandio is aligned to this specification; it is not published by, endorsed by or affiliated with Pearson, and it reproduces none of Pearson's wording.
The 10 questions
Answer them on paper, then open the lesson's exam practice to have them marked. The mark scheme, the accepted and rejected answers and the annotated model answer are in Incandio and are not printed here — an answer beside its question is not practice.
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A student pushes one pole of a bar magnet into a coil of wire connected to a sensitive centre-zero voltmeter, holds it still inside for a few seconds, and then pulls it out again. She repeats the whole sequence several times, changing one thing each time.
Table 1 — the largest voltmeter reading in each trial Trial What was done Peak reading / mV 1 north pole pushed in slowly +4 2 north pole pushed in quickly +11 3 magnet held still inside the coil 0 4 north pole pulled out quickly −11 5 south pole pushed in quickly −11 (a)
(1)Give
Give the reading obtained in trial 3, using Table 1.
A student pushes one pole of a bar magnet into a coil of wire connected to a sensitive centre-zero voltmeter, holds it still inside for a few seconds, and then pulls it out again. She repeats the whole sequence several times, changing one thing each time.
Table 1 — the largest voltmeter reading in each trial Trial What was done Peak reading / mV 1 north pole pushed in slowly +4 2 north pole pushed in quickly +11 3 magnet held still inside the coil 0 4 north pole pulled out quickly −11 5 south pole pushed in quickly −11 reading obtained = ............................
(b)
(3)Explain
Explain why trials 4 and 5 in Table 1 both give a negative reading.
A student pushes one pole of a bar magnet into a coil of wire connected to a sensitive centre-zero voltmeter, holds it still inside for a few seconds, and then pulls it out again. She repeats the whole sequence several times, changing one thing each time.
Table 1 — the largest voltmeter reading in each trial Trial What was done Peak reading / mV 1 north pole pushed in slowly +4 2 north pole pushed in quickly +11 3 magnet held still inside the coil 0 4 north pole pulled out quickly −11 5 south pole pushed in quickly −11 (c)
(3)Suggest
Suggest what the student would see if she moved the magnet in and out repeatedly at a steady rate.
A student pushes one pole of a bar magnet into a coil of wire connected to a sensitive centre-zero voltmeter, holds it still inside for a few seconds, and then pulls it out again. She repeats the whole sequence several times, changing one thing each time.
Table 1 — the largest voltmeter reading in each trial Trial What was done Peak reading / mV 1 north pole pushed in slowly +4 2 north pole pushed in quickly +11 3 magnet held still inside the coil 0 4 north pole pulled out quickly −11 5 south pole pushed in quickly −11 (Total for Question 1 = 7 marks)
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(1)Which
Which action induces a voltage in a coil of wire?
Action A holding a strong magnet still inside the coil B moving a magnet into the coil C placing the coil next to a piece of iron D warming the coil (Total for Question 2 = 1 mark)
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(1)State
State what must happen to the magnetic field through a coil for a voltage to be induced in it.
(Total for Question 3 = 1 mark)
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(2)Give
Give two ways of increasing the voltage induced when a magnet is moved into a coil.
(Total for Question 4 = 2 marks)
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(3)Explain
Explain why no voltage is induced when a magnet is held stationary inside a coil.
(Total for Question 5 = 3 marks)
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(4)Describe
Describe how rotating a coil in a magnetic field generates electricity.
Figure 1 — a simple generator (Total for Question 6 = 4 marks)
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(3)Compare
Compare the motor effect with electromagnetic induction.
(Total for Question 7 = 3 marks)
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(3)Suggest
Suggest how the pad charges the toothbrush without any metal contact between them.
A cordless charging pad — An electric toothbrush is charged by standing it on a plastic pad. There are no exposed metal contacts on either the pad or the brush, and the two are separated by two layers of sealed plastic. The pad contains a coil connected to the mains, and the base of the toothbrush contains a second coil connected to its battery.
(Total for Question 8 = 3 marks)
Have them marked, then defend the answer
Practice tells you the mark; teaching it back tells you whether you understand it. On Incandio a topic counts as mastered only once you have taught it and defended it.
- Mark these questions — 10 questions, marked on Incandio against the authored scheme, with the mistake you actually made named.
- Teach it — explain Electromagnetic Induction to Ember, an AI pupil who does not have it yet and asks the awkward question.
- Defend it — argue it against Michael Faraday over three rounds, marked against descriptors you can read first.
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Back to the lesson
- Electromagnetic Induction — Move a magnet near a coil and a voltage appears from nowhere — provided something is changing.
- All of Incandio Physics · Incandio Exam Practice