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Course: OCR A Level Physics A H556
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Curriculum

OCR A Level Physics A H556

1. Development of Practical Skills in Physics

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2. Foundations in Physics

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3. Forces and Motion

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4. Electrons, Waves and Photons

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OCR H556 chapter questions and answers

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Quiz

1.3.2 Calculating Uncertainties – Check yourself

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  • Questions count: 6
  • Passing grade: B+
  • Time limit: 10 minutes
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1.
A length is 50.0 ± 0.5 cm. Its percentage uncertainty is
0.5%
1%
2%
10%
2.
A radius is 4.0 ± 0.2 cm. The percentage uncertainty in the area πr2 is
5%
2.5%
10%
25%
3.
The length 20.0 ± 0.2 cm is subtracted from 30.0 ± 0.3 cm. The absolute uncertainty in the difference is
0.1 cm
0.3 cm
0.5 cm
0.2 cm
4.
A speed v = d / t, with d uncertain by 2% and t by 3%. The percentage uncertainty in v is
5%
1%
6%
1.5%
5.
A measured quantity Q = x3 and x has 1.5% uncertainty. Q has an uncertainty of
1.5%
3.0%
0.5%
4.5%
6.
The uncertainty in a gradient from a graph is best found from
the number of points
the difference between the best-fit and worst acceptable gradients
the units of the axes
the intercept alone
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Part of 2. Foundations in Physics — see every lesson and quiz in this unit.
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