Home / G2 Science (Physics) / Practical electricity / Check what I know: Practical Electricity · G2 Science Physics Exit to Practical electricity Check what I know: Practical Electricity · G2 Science Physics Check what you know about Practical Electricity, practise what needs work, then check your progress and return for a later review. Any practical work must avoid live mains.
Learning goals Work through the questions and use the feedback to plan revision. What this check covers: This check samples electrical heating, power and energy, billing, household hazards, protection, conductor roles and safe plug wiring. It guides practice, does not establish mastery and never asks learners to work on live mains equipment. Your answers help choose what to revise next.Check what I know
Check what I know: Practical Electricity · G2 Science Physics A text-first Practical Electricity assessment with quantities, units, conductor names, colours, terminals, fault paths and protective actions stated explicitly.
About 8 minutes
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Answer 6 short questions. This starting check helps choose what to work on; it does not prove mastery.
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A 230 V kettle takes a steady 4.0 A for 100 s. Which statement correctly describes its useful transfer, power and transferred energy?
Its resistive element transfers electrical energy to internal energy; P = 920 W and E = 92 000 J. It creates thermal energy; P = 57.5 W and E = 5750 J. It transfers thermal energy into electrical energy; P = 234 W and E = 23 400 J. It stores charge in the element; P = 920 J and E = 9.2 W. An energy meter records 3.0 kWh used by a heater. The tariff is $0.32 per kWh, with no other charges. What is the cost?
Which statement correctly links damaged insulation, an overloaded cable and damp hands to their hazards?
Damaged insulation can expose live conductors; overload can overheat and ignite cable insulation; damp can lower body resistance and increase shock current. Damaged insulation makes live neutral; overload cools cables; damp raises body resistance. All three conditions only reduce appliance power and cannot cause shock or fire. Only damp is hazardous; insulation damage and cable overload are safe if current still flows. An appliance draws a steady current of 4.0 A. Which complete protection statement is correct? Use the smallest listed fuse rating above the steady operating current; assume the listed types are approved for this cable and appliance and there is no starting surge.
A 5 A fuse allows normal use and opens the circuit on sufficient overcurrent; an earthed metal casing provides a low-resistance fault path, while a double-insulated casing uses insulating barriers instead of earth. A 3 A fuse is suitable because a fuse should be rated below the operating current; earth is the normal return and double insulation adds a second live wire. A 13 A fuse gives the best protection because a higher rating is always safer; earth carries current continuously and plastic raises the supply voltage. A fuse regulates the operating current without opening the circuit, and both casing types must be earthed. A mains appliance is running normally, and its only switch is fitted in the neutral wire. Which statement is correct?
The operating current flows in the live and neutral wires, and with only that switch open the appliance's internal wiring stays connected to the live supply. The operating current flows in the live and earth wires, and opening that switch disconnects the appliance completely. The operating current flows only in the live wire, and opening that switch makes the appliance safe to open up. All three wires share the operating current equally, and switch position makes no difference to safety. A three-pin mains plug has its live terminal connected through a correctly fitted fuse. Which combination of wire connections and cable-grip position is correct?
Brown to L, blue to N, green/yellow to E; the grip clamps the outer cable sheath. Blue to L, brown to N, green/yellow to E; the grip clamps the outer cable sheath. Brown to L, green/yellow to N, blue to E; the grip clamps the outer cable sheath. Brown to L, blue to N, green/yellow to E; the grip clamps the individual insulated wires. Practise
Practise: Practical Electricity · G2 Science Physics A text-first Practical Electricity assessment with quantities, units, conductor names, colours, terminals, fault paths and protective actions stated explicitly.
About 10 minutes
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Questions are selected when you start. Use the feedback to decide what to practise next; this does not prove mastery.
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Practise
Practise after feedback: Practical Electricity · G2 Science Physics A text-first Practical Electricity assessment with quantities, units, conductor names, colours, terminals, fault paths and protective actions stated explicitly.
About 10 minutes
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Questions are selected when you start. Use the feedback to decide what to practise next; this does not prove mastery.
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Beyond the syllabus: optional enrichment that does not count towards your progress.
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Check my progress
Check my progress: Practical Electricity · G2 Science Physics A text-first Practical Electricity assessment with quantities, units, conductor names, colours, terminals, fault paths and protective actions stated explicitly.
About 10 minutes
Finish and submit Check my progress
Answer 10 questions. If accepted, this result can contribute to your course progress.
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Recent attempts History is stored only in this browser.
No completed attempts are saved yet.
Beyond the syllabus: optional enrichment that does not count towards your progress.
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Check again
Check again: Practical Electricity · G2 Science Physics A text-first Practical Electricity assessment with quantities, units, conductor names, colours, terminals, fault paths and protective actions stated explicitly.
About 10 minutes
Finish and submit Check again
Answer 10 questions. If accepted, this result can contribute to your course progress.
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Beyond the syllabus: optional enrichment that does not count towards your progress.
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Review
Review: Practical Electricity · G2 Science Physics A text-first Practical Electricity assessment with quantities, units, conductor names, colours, terminals, fault paths and protective actions stated explicitly.
About 10 minutes
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Answer 10 questions. A scheduled review can contribute to your course progress only when it is due and the result is accepted.
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Course and syllabus information Course SEC G2 Science Physics component Edition SEC G2 Science Physics component 2027