Every sub-topic OCR can examine in this topic, with its reference number from the official specification. The Y12 and Y13 tags show when each sub-topic is usually taught.
2.2.1Measurements and uncertaintiesY12
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Easy and medium questions from this topic, each with a worked solutions and the mark for every step. All 10 questions in this topic, free, no account needed.
Working as a physicist
Easy
Random and systematic errors · Year 12 · 4 marks
Distinguish between random and systematic errors, giving one way to reduce each.
(4)
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Working, step by stepMarks
Random: unpredictable scatter about the true value.
B1
Reduce by repeating and averaging.
B1
Systematic: a constant offset in every reading (e.g. zero error).
B1
Reduce by calibrating or correcting for the zero error.
B1
Total4
MMethodMethod mark: for a correct method, even with a slip.
AAccuracyAccuracy mark: for a correct answer from a correct method.
BIndependentIndependent mark: for a correct fact or result on its own, with no method needed.
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