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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

1.2.4 Evaluating Results and Drawing Conclusions – Check yourself

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  • Questions count: 6
  • Passing grade: B+
  • Time limit: 10 minutes
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1.
A result of 9.4 ± 0.1 m s−2 is obtained for g. Which statement is best?
It agrees with 9.8 because it is close
It is inconsistent with 9.8, suggesting a systematic error
It is precise so it must be accurate
It is too uncertain to say anything
2.
Which error is most reduced by repeating and averaging?
Zero error
Calibration error
Wrong formula used
Random error
3.
Which is a specific, useful improvement for a timing experiment?
Be more careful
Use better stopwatch
Time a larger number of oscillations
Do it again
4.
A graph that should pass through the origin has a positive y-intercept. This most likely indicates:
A systematic offset such as a zero error
Random error only
An anomalous point
Too many data points
5.
Two values 20 ± 1 and 24 ± 1 are compared. Their ranges are:
Overlapping
Touching but not overlapping
Separate: 19–21 and 23–25
Identical
6.
A percentage difference from the accepted value is 1.5% and the percentage uncertainty is 4%. The best conclusion is:
Result is inconsistent
Systematic error is certain
The experiment is invalid
Result is consistent with the accepted value
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