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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-9702-EC2-0011 markL1 FoundationCalculatorPotential difference
3030 J of energy is transferred when 2.52.5 C of charge passes through a resistor. Calculate the p.d. across it.

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Salam Academy Original Practice · Proposed mark scheme
SA-9702-EC2-0021 markL1 FoundationCalculatorElectrical power
A 1212 V supply drives a current of 2.52.5 A through a motor. Calculate the power.

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Salam Academy Original Practice · Proposed mark scheme
SA-9702-EC2-0031 markL1 FoundationCalculatorElectrical power
A current of 0.500.50 A flows through a 4040 Ω resistor. Calculate the power dissipated.

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Salam Academy Original Practice · Proposed mark scheme
SA-9702-EC2-0051 markL1 FoundationCalculatorPotential difference
The potential difference across a component is
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Salam Academy Original Practice · Proposed mark scheme
SA-9702-EC2-0061 markL1 FoundationCalculatorElectrical power
A 9.09.0 V battery supplies 0.200.20 A for 5.05.0 minutes. Calculate the energy transferred.

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Salam Academy Original Practice · Proposed mark scheme
SA-9702-EC2-0071 markL1 FoundationCalculatorPotential difference
The volt is equivalent to
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Salam Academy Original Practice · Proposed mark scheme
SA-9702-EC2-0091 markL1 FoundationCalculatorElectrical power
A 6060 W lamp operates on a 230230 V supply. Calculate the current.

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Salam Academy Original Practice · Proposed mark scheme
SA-9702-EC2-0101 markL1 FoundationCalculatorElectrical power
The p.d. across a fixed resistor is doubled. State the factor by which the power increases.

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Salam Academy Original Practice · Proposed mark scheme
SA-9702-EC2-0042 marksL2 StandardCalculatorElectrical power
A heater is rated 10001000 W on a 230230 V supply. Calculate its resistance.

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Salam Academy Original Practice · Proposed mark scheme
SA-9702-EC2-0081 markL2 StandardCalculatorPotential difference
An electron is accelerated from rest through a p.d. of 20002000 V. Calculate the energy it gains, in units of 10−1610^{-16} J.

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Salam Academy Original Practice · Proposed mark scheme
SA-9702-EC2-0121 markL2 StandardCalculatorPotential difference
The e.m.f. of a cell is best described as
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Salam Academy Original Practice · Proposed mark scheme
SA-9702-EC2-0113 marksL3 ExamCalculatorElectrical power
A kettle is rated 2.32.3 kW at 230230 V. Assuming its resistance is constant, calculate its power when connected to a 220220 V supply.

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Salam Academy Original Practice · Proposed mark scheme