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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

1.3.1 Using Appropriate Instruments and Techniques – Check yourself

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  • Questions count: 6
  • Passing grade: B+
  • Time limit: 10 minutes
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1.
A micrometer reads 0.04 mm when closed. A wire gives a reading of 0.71 mm. What is the diameter?
0.75 mm
0.67 mm
0.71 mm
0.04 mm
2.
Which change reduces random error?
Subtracting the zero error
Using a different instrument with a faulty scale
Taking repeat readings and averaging
Viewing the scale from one side
3.
A reading is 25.0 cm with an absolute uncertainty of 0.5 cm. What is the percentage uncertainty?
0.5%
5.0%
2.0%
12.5%
4.
Why is the thickness of one sheet of paper found from a stack of many sheets?
It reduces the absolute uncertainty in the thickness of one sheet
It removes the zero error
It makes the ruler more accurate
It increases the range of the instrument
5.
Readings of a length are 12.1, 12.2, 12.1 and 12.2 cm but the true length is 13.0 cm. The measurements are:
Accurate and precise
Accurate but not precise
Neither accurate nor precise
Precise but not accurate
6.
A graph of y against x should pass through the origin but has a positive y-intercept. The most likely cause is:
Random error in each reading
A systematic zero error
Using too many readings
A large range of x
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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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