Pearson Edexcel International GCSE in Physics · 4PH1 · Free · no account needed
Electrical Power and Energy — exam questions
12 original Incandio exam-style questions on Electrical Power and Energy, 32 marks, about 32 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 Electrical Power and Energy — 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
6 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
- Give (1–2 marks)
- a short factual answer
- Calculate (1–5 marks)
- select the equation, substitute, evaluate — and state the unit Misread as: giving a bare number with no equation and no unit
- 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
- Suggest (1–3 marks)
- a plausible answer applying taught physics to an unfamiliar arrangement
- Complete (1–4 marks)
- the missing entries in a table, circuit or diagram
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 2.4 · 2.3 · 2.5. 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 12 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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Table 1 — four appliances on a 230 V mains supply Appliance Power / W Working current / A Fuse fitted table lamp 60 0.26 3 A television 115 0.50 3 A toaster 920 4.0 5 A kettle 2300 to be found 13 A (a)
(3)Complete
Complete Table 1 by working out the working current of the kettle.
Table 1 — four appliances on a 230 V mains supply Appliance Power / W Working current / A Fuse fitted table lamp 60 0.26 3 A television 115 0.50 3 A toaster 920 4.0 5 A kettle 2300 to be found 13 A ............................ A
(b)
(2)Explain
Explain why the toaster in Table 1 is fitted with a 5 A fuse rather than a 3 A one.
Table 1 — four appliances on a 230 V mains supply Appliance Power / W Working current / A Fuse fitted table lamp 60 0.26 3 A television 115 0.50 3 A toaster 920 4.0 5 A kettle 2300 to be found 13 A (c)
(3)Calculate
Calculate the energy transferred by the kettle in Table 1 in 3.0 minutes.
Table 1 — four appliances on a 230 V mains supply Appliance Power / W Working current / A Fuse fitted table lamp 60 0.26 3 A television 115 0.50 3 A toaster 920 4.0 5 A kettle 2300 to be found 13 A energy transferred by the kettle = ............................ J
(d)
(3)Suggest
Suggest why fitting a 13 A fuse to the table lamp in Table 1 would be unsafe.
Table 1 — four appliances on a 230 V mains supply Appliance Power / W Working current / A Fuse fitted table lamp 60 0.26 3 A television 115 0.50 3 A toaster 920 4.0 5 A kettle 2300 to be found 13 A (Total for Question 1 = 11 marks)
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(1)Which
Which is the correct unit for electrical power?
Unit A joule B watt C volt D coulomb (Total for Question 2 = 1 mark)
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(1)Give
Give one useful domestic application of the heating effect of a current.
(Total for Question 3 = 1 mark)
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(3)Calculate
Calculate the power of a device that draws 4.5 A from a 12 V supply.
............................ W
(Total for Question 4 = 3 marks)
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(3)Calculate
Calculate the energy transferred by a 3.0 A appliance running from a 230 V supply for 5.0 minutes.
energy transferred by a 3 = ............................ J
(Total for Question 5 = 3 marks)
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(3)Explain
Explain why a wire carrying a current becomes warm.
(Total for Question 6 = 3 marks)
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(3)Explain
Explain why a fuse should be rated just above an appliance's normal working current.
(Total for Question 7 = 3 marks)
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(3)Suggest
Suggest why the flex supplied with a kettle is noticeably thicker than the flex on a table lamp.
Table 1 — four appliances on a 230 V mains supply Appliance Power / W Working current / A Fuse fitted table lamp 60 0.26 3 A television 115 0.50 3 A toaster 920 4.0 5 A kettle 2300 to be found 13 A (Total for Question 8 = 3 marks)
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(4)Calculate
An immersion heater rated at 2.8 kW is switched on for 25 minutes. Calculate the energy it transfers.
energy transferred = ............................ J
(Total for Question 9 = 4 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 — 12 questions, marked on Incandio against the authored scheme, with the mistake you actually made named.
- Teach it — explain Electrical Power and Energy to Ember, an AI pupil who does not have it yet and asks the awkward question.
- Defend it — argue it against James Prescott Joule over three rounds, marked against descriptors you can read first.
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Back to the lesson
- Electrical Power and Energy — Why a wire carrying a current gets hot, how fast a device uses energy, and how to pick a fuse.
- All of Incandio Physics · Incandio Exam Practice