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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

0/56 Dr Dabour Hub Science Diagram and Course Material

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

1.2.5 Observations and Measurements – Check yourself

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  • Questions count: 6
  • Passing grade: B+
  • Time limit: 10 minutes
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1.
Which instrument is best for measuring the diameter of a 0.50 mm wire?
Metre rule
Vernier callipers (0.1 mm)
Micrometer screw gauge
Tape measure
2.
A micrometer reads −0.02 mm with jaws closed. A wire reads 0.54 mm. The true diameter is:
0.52 mm
0.54 mm
0.50 mm
0.56 mm
3.
Why is a fiducial marker used when timing oscillations?
To damp the oscillation
To reduce friction
To give a clear reference for start and stop positions
To increase the period
4.
Timing 10 oscillations with a 0.2 s reaction uncertainty gives a total of 14.0 s. The percentage uncertainty is about:
1.4%
14%
0.2%
0.14%
5.
Parallax error is reduced by:
Using a lower range
Viewing the scale from directly in front at 90°
Taking fewer readings
Rounding results
6.
A stack of 50 sheets is 4.5 mm thick, uncertainty ±0.5 mm. The thickness of one sheet is:
0.09 ± 0.5 mm
0.09 ± 0.01 mm
4.5 ± 0.5 mm
0.9 ± 0.1 mm
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Part of 1. Development of Practical Skills in Physics — see every lesson and quiz in this unit.
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