Uncertainty in measurement can occur due to theI. limitation of instrumentsII. natural variationsIII. frequent errors
Correct answer: D. II and III.
- A. I only.
- B. III only.
- C. I and II.
- D. II and III.
Explanation
Uncertainty in measurement can arise from multiple sources. Natural variations (II) refer to the inherent variability in the system being measured, which can lead to different results even if the procedure is repeated exactly. Frequent errors (III) refer to mistakes that occur during the measurement process, which can be due to human error or instrument calibration issues. Although the limitation of instruments (I) can also cause uncertainty, the correct combination of factors listed in the options that lead to uncertainty are II and III. Therefore, the correct answer is Option D.
Last updated
About Errors and Significant Figures
Measurement errors include random and systematic effects, absolute, fractional and percentage uncertainty, and the precision shown by significant figures. Questions apply rounding rules and uncertainty propagation in addition, subtraction, multiplication and division, while distinguishing accuracy from precision and uncertainty from an actual mistake.
Practise Measurements
262 free Measurements MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Physics questions like this
Physics is on 9 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
A student makes measurements from which she calculated the speed of sound as 321 ms-1 . She estimates that the result is accurate to +3% or -3% . Which of the following give results expressed to the appropriate number of significant figures?
A student performs an experiment in his college laboratory to determine the specific heat of water by electrical method. At the end of experiment, the graph that he drew betweentemperature (T) and time (t) was incorrect.Which of the following can be a source of error that caused inaccurate reading during his observation?
A systematic error can be removed by
An observer notes the reading of scale from different angles (parallax) while measuring the length of the wire, what type of error is possible:
During a experiment, one measured the mass of a mosquito and found it to be 1.20 x 10^-5 Kg. The numbers of significant figures in this case are: