6. Practical Skills
Uncertainty — Quiz
Test your understanding of uncertainty with 5 practice questions.
Practice Questions
Question 1
What is the uncertainty in a measurement if the instrument’s smallest division is 0.1 cm?
Question 2
A length is measured as $12.4 \pm 0.2$ cm. What is the percentage uncertainty?
Question 3
Which of the following best describes the combined uncertainty when adding two measurements: $a = 5.0 \pm 0.1$ cm and $b = 3.0 \pm 0.2$ cm?
Question 4
If a measured value is $25.6$ m and the uncertainty is $0.4$ m, how should the result be reported with the correct number of significant figures?
Question 5
A time measurement is recorded as $2.50 \pm 0.05$ s. If this time is doubled, what is the resulting absolute uncertainty?