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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-PQ2-0011 markL1 FoundationCalculatorUncertainties
A length is measured as (25.0±0.1)(25.0\pm0.1) cm. Calculate the percentage uncertainty.

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Salam Academy Original Practice · Proposed mark scheme
SA-9702-PQ2-0021 markL1 FoundationCalculatorUncertainties
Two lengths, (12.0±0.2)(12.0\pm0.2) cm and (8.0±0.1)(8.0\pm0.1) cm, are added. Calculate the absolute uncertainty in the total.

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Salam Academy Original Practice · Proposed mark scheme
SA-9702-PQ2-0051 markL1 FoundationCalculatorErrors
Which is an example of a systematic error?
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Salam Academy Original Practice · Proposed mark scheme
SA-9702-PQ2-0061 markL1 FoundationCalculatorErrors
A set of repeated measurements is described as precise. This means that
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Salam Academy Original Practice · Proposed mark scheme
SA-9702-PQ2-0071 markL1 FoundationCalculatorErrors
A measurement is described as accurate when
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Salam Academy Original Practice · Proposed mark scheme
SA-9702-PQ2-0082 marksL1 FoundationCalculatorUncertainties
Three timings are 2.422.42 s, 2.462.46 s and 2.442.44 s. Taking the uncertainty as half the range, determine the absolute uncertainty in the mean.

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Salam Academy Original Practice · Proposed mark scheme
SA-9702-PQ2-0121 markL1 FoundationCalculatorErrors
The effect of random errors on a result can be reduced by
Choose one option

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Salam Academy Original Practice · Proposed mark scheme
SA-9702-PQ2-0032 marksL2 StandardCalculatorUncertainties
V=(5.0±0.1)V=(5.0\pm0.1) V and I=(0.50±0.02)I=(0.50\pm0.02) A. Calculate the percentage uncertainty in R=VIR=\dfrac VI.

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Salam Academy Original Practice · Proposed mark scheme
SA-9702-PQ2-0042 marksL2 StandardCalculatorUncertainties
The radius of a circle is (2.0±0.1)(2.0\pm0.1) cm. Calculate the percentage uncertainty in its area.

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Salam Academy Original Practice · Proposed mark scheme
SA-9702-PQ2-0092 marksL2 StandardCalculatorUncertainties
g=4π2lT2g=\dfrac{4\pi^2l}{T^2}. The percentage uncertainty in ll is 1%1\% and in TT is 2%2\%. Calculate the percentage uncertainty in gg.

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Salam Academy Original Practice · Proposed mark scheme
SA-9702-PQ2-0102 marksL2 StandardCalculatorUncertainties
A cube has side (2.00±0.02)(2.00\pm0.02) cm and mass (64.0±0.5)(64.0\pm0.5) g. Calculate the percentage uncertainty in its density.

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Salam Academy Original Practice · Proposed mark scheme
SA-9702-PQ2-0113 marksL3 ExamCalculatorUncertainties
For the cube in the previous question (side 2.002.00 cm, mass 64.064.0 g, 3.8%3.8\% uncertainty in density), determine the absolute uncertainty in the density in g cm⁻³.

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Salam Academy Original Practice · Proposed mark scheme