Curriculum
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

1.3.5 Calipers, Micrometers and Vernier Scales – Check yourself

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  • Questions count: 6
  • Passing grade: B+
  • Time limit: 10 minutes
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1.
The resolution of a micrometer with a 0.5 mm pitch and 50 thimble divisions is:
0.1 mm
0.5 mm
0.05 mm
0.01 mm
2.
A caliper reads 12 mm on the main scale with the 3rd vernier line coinciding (resolution 0.1 mm). The reading is:
15 mm
12.3 mm
12.03 mm
12.7 mm
3.
A micrometer reads 0.03 mm with its jaws closed. The measured reading of a wire is 1.42 mm. The diameter is:
1.45 mm
1.42 mm
1.03 mm
1.39 mm
4.
The ratchet on a micrometer is used to:
Apply a consistent, small force to the object
Magnify the scale
Lock the thimble
Zero the instrument
5.
A diameter has percentage uncertainty 2%. The percentage uncertainty in the cross-sectional area is:
1%
4%
2%
8%
6.
Why measure a wire at several places and orientations?
To remove the zero error
To make the micrometer more precise
To allow for non-uniform thickness or non-circular cross-section
To increase the resolution
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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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