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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

1.1.3 Refining of Experimental Design – Check yourself

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  • Questions count: 6
  • Passing grade: B+
  • Time limit: 10 minutes
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1.
Timing 20 oscillations instead of 1 mainly reduces:
the mass of the pendulum
systematic error from air resistance
the percentage uncertainty from reaction time
the amplitude
2.
A graph that should pass through the origin has a positive y-intercept. This most likely indicates:
a random error
a perfect experiment
too many readings
a systematic error such as a zero error
3.
A wire diameter is 0.60 mm with an uncertainty of 0.01 mm. The percentage uncertainty is about:
1.7%
0.017%
0.6%
6%
4.
Which is the best refinement to remove human reaction-time error when timing a falling trolley?
Use a larger stopwatch
Use light gates connected to a timer
Repeat three times
Ask a friend to time it
5.
Which improvement addresses systematic error?
Taking more repeat readings
Plotting a graph
Checking and correcting for zero error
Using a longer range
6.
A student's evaluation says 'be more careful'. Why would this gain little credit?
It is too short
It is too scientific
It contains units
It is not specific or linked to a source of error
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