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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-EC1-0011 markL1 FoundationCalculatorCharge & current
A current of 0.400.40 A flows for 2.02.0 minutes. Calculate the charge that flows.

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Salam Academy Original Practice · Proposed mark scheme
SA-9702-EC1-0021 markL1 FoundationCalculatorCharge & current
Calculate the number of electrons that make up a charge of 4848 C, in units of 102010^{20}. (e=1.60×10−19e=1.60\times10^{-19} C)

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Salam Academy Original Practice · Proposed mark scheme
SA-9702-EC1-0041 markL1 FoundationCalculatorCharge & current
The charge on any object is always
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Salam Academy Original Practice · Proposed mark scheme
SA-9702-EC1-0071 markL1 FoundationCalculatorCharge & current
How long does it take a current of 5050 mA to transfer 1.01.0 C of charge?

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Salam Academy Original Practice · Proposed mark scheme
SA-9702-EC1-0091 markL1 FoundationCalculatorCharge & current
Conventional current flows
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Salam Academy Original Practice · Proposed mark scheme
SA-9702-EC1-0121 markL1 FoundationCalculatorCharge & current
Electric current is defined as
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Salam Academy Original Practice · Proposed mark scheme
SA-9702-EC1-0032 marksL2 StandardCalculatorDrift velocity
A copper wire of cross-sectional area 1.0×10−61.0\times10^{-6} m² carries a current of 2.02.0 A. Copper has 8.5×10288.5\times10^{28} free electrons per m³. Calculate the drift velocity, in mm s⁻¹.

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Salam Academy Original Practice · Proposed mark scheme
SA-9702-EC1-0051 markL2 StandardCalculatorCharge & current
Which charge is not possible on an oil drop?
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Salam Academy Original Practice · Proposed mark scheme
SA-9702-EC1-0061 markL2 StandardCalculatorDrift velocity
A current flows through a wire that has a thin section. Compared with the thick section, the drift velocity in the thin section is
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Salam Academy Original Practice · Proposed mark scheme
SA-9702-EC1-0082 marksL2 StandardCalculatorCharge & current
A current decreases uniformly from 0.600.60 A to zero in 1010 s. Calculate the total charge that flows.

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Salam Academy Original Practice · Proposed mark scheme
SA-9702-EC1-0101 markL2 StandardCalculatorDrift velocity
A wire is replaced by one of the same material with half the diameter, carrying the same current. State the factor by which the drift velocity changes.

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Salam Academy Original Practice · Proposed mark scheme
SA-9702-EC1-0113 marksL3 ExamCalculatorDrift velocity
A copper wire of diameter 1.01.0 mm carries a current of 3.03.0 A. Copper has 8.5×10288.5\times10^{28} free electrons per m³. Calculate the drift velocity, in mm s⁻¹.

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Salam Academy Original Practice · Proposed mark scheme