A student makes the following statements about uncertainties - Scottish Highers Physics - Question 25 - 2019
Question 25
A student makes the following statements about uncertainties.
I All measurements of physical quantities are liable to uncertainties.
II Random uncertainties occur... show full transcript
Worked Solution & Example Answer:A student makes the following statements about uncertainties - Scottish Highers Physics - Question 25 - 2019
Step 1
I All measurements of physical quantities are liable to uncertainties.
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Answer
This statement is correct. All physical measurements are subject to uncertainties due to limitations in measurement tools and methodologies.
Step 2
II Random uncertainties occur when a measurement is repeated and slight variations occur.
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This statement is also correct. Random uncertainties arise from unpredictable variations in the measurement process, which can lead to different results each time an experiment is conducted.
Step 3
III Systematic uncertainties in a quantity occur when measurements are either all smaller or all larger than the true value of the quantity.
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Answer
This statement is correct as well. Systematic uncertainties arise from consistent biases in the measurement process, causing all measurements to deviate consistently in one direction from the true value.
Step 4
Which of these statements is/are correct?
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Answer
Since all three statements are correct, the answer is E: I, II and III.
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