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Practise

Question bank

Original exam-style questions, mapped to your syllabus. Answers are checked for mathematical equivalence and every attempt updates your mastery.

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12 questions

SA-5054-EL5-0012 marksL1 FoundationCalculatorPower & cost
A current of 2.02.0 A flows through an appliance on a 230230 V supply. Calculate its power.

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Salam Academy Original Practice · Proposed mark scheme
SA-5054-EL5-0022 marksL1 FoundationCalculatorPower & cost
A 11501150 W kettle works on a 230230 V supply. Calculate the current it draws.

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Salam Academy Original Practice · Proposed mark scheme
SA-5054-EL5-0032 marksL1 FoundationCalculatorPower & cost
A 1212 V lamp carries a current of 0.500.50 A for 6060 s. Calculate the energy transferred.

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Salam Academy Original Practice · Proposed mark scheme
SA-5054-EL5-0041 markL1 FoundationCalculatorPower & cost
A 3.03.0 kW heater is used for 2.02.0 hours. Calculate the energy transferred in kWh.

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Salam Academy Original Practice · Proposed mark scheme
SA-5054-EL5-0051 markL1 FoundationCalculatorPower & cost
Electricity costs $0.15\$0.15 per kWh. Calculate the cost, in dollars, of using 6.06.0 kWh.

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Salam Academy Original Practice · Proposed mark scheme
SA-5054-EL5-0071 markL1 FoundationCalculatorSafety
In a plug, the fuse is connected in the
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Salam Academy Original Practice · Proposed mark scheme
SA-5054-EL5-0091 markL1 FoundationCalculatorSafety
A hair dryer has a plastic case and no earth wire. It is safe because it is
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Salam Academy Original Practice · Proposed mark scheme
SA-5054-EL5-0101 markL1 FoundationCalculatorSafety
Which is an electrical hazard?
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Salam Academy Original Practice · Proposed mark scheme
SA-5054-EL5-0121 markL1 FoundationCalculatorPower & cost
The kilowatt-hour is a unit of
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Salam Academy Original Practice · Proposed mark scheme
SA-5054-EL5-0062 marksL2 StandardCalculatorSafety
A 920920 W appliance runs on 230230 V. Fuses of 33 A, 55 A and 1313 A are available. State the rating of the fuse that should be fitted, in A.

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Salam Academy Original Practice · Proposed mark scheme
SA-5054-EL5-0081 markL2 StandardCalculatorSafety
The earth wire protects a user of an appliance with a metal case because, if the live wire touches the case,
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Salam Academy Original Practice · Proposed mark scheme
SA-5054-EL5-0113 marksL3 ExamCalculatorPower & cost
A 2.02.0 kW heater is used for 3030 minutes every day for 3030 days. Electricity costs $0.20\$0.20 per kWh. Calculate the total cost, in dollars.

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Salam Academy Original Practice · Proposed mark scheme