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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-AC1-0011 markL1 FoundationCalculatorr.m.s. and power
Calculate the peak value of a 230230 V r.m.s. supply.

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Salam Academy Original Practice · Proposed mark scheme
SA-9702-AC1-0031 markL1 FoundationCalculatora.c. terms
Calculate the period of a 5050 Hz supply, in ms.

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Salam Academy Original Practice · Proposed mark scheme
SA-9702-AC1-0041 markL1 FoundationCalculatorr.m.s. and power
The r.m.s. value of an alternating current is
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Salam Academy Original Practice · Proposed mark scheme
SA-9702-AC1-0061 markL1 FoundationCalculatorr.m.s. and power
For I=3.0sin⁡(100πt)I=3.0\sin(100\pi t) A, calculate the r.m.s. current.

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Salam Academy Original Practice · Proposed mark scheme
SA-9702-AC1-0071 markL1 FoundationCalculatorr.m.s. and power
For a sinusoidal a.c. in a resistor, the mean power is
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Salam Academy Original Practice · Proposed mark scheme
SA-9702-AC1-0101 markL1 FoundationCalculatora.c. terms
The mean value of a sinusoidal alternating current over a complete cycle is
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Salam Academy Original Practice · Proposed mark scheme
SA-9702-AC1-0121 markL1 FoundationCalculatorr.m.s. and power
The ratio of peak voltage to r.m.s. voltage for a sinusoidal supply is
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Salam Academy Original Practice · Proposed mark scheme
SA-9702-AC1-0022 marksL2 StandardCalculatorr.m.s. and power
An a.c. supply of peak voltage 2020 V is connected across a 1010 Ω resistor. Calculate the mean power.

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Salam Academy Original Practice · Proposed mark scheme
SA-9702-AC1-0051 markL2 StandardCalculatora.c. terms
A current is given by I=3.0sin⁡(100πt)I=3.0\sin(100\pi t) A. State its frequency.

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Salam Academy Original Practice · Proposed mark scheme
SA-9702-AC1-0082 marksL2 StandardCalculatora.c. terms
An oscilloscope shows a sine wave 6.06.0 divisions peak-to-peak with the yy-gain at 2.02.0 V per division. Calculate the r.m.s. voltage.

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Salam Academy Original Practice · Proposed mark scheme
SA-9702-AC1-0091 markL2 StandardCalculatorr.m.s. and power
A 2.02.0 kW heater runs on 230230 V r.m.s. Calculate the peak current.

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Salam Academy Original Practice · Proposed mark scheme
SA-9702-AC1-0113 marksL3 ExamCalculatorr.m.s. and power
A resistor dissipates 3636 W when connected to a 1212 V d.c. supply. It is then connected to an a.c. supply of peak 1212 V. Calculate the mean power dissipated.

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Salam Academy Original Practice · Proposed mark scheme