Random errors can be reduced byI. taking zero correctionII. taking mean of several measurementsIII. comparing the instrument with another more accurate one
Correct answer: A. II only.
- A. II only.
- B. III only.
- C. I and II.
- D. I and III.
Explanation
The correct answer is Option A:II only.Random errors can be reduced by taking the mean of several measurements, as this averages out the unpredictable variations inherent in each measurement. Option III addresses systematic errors, as comparing with a more accurate instrument helps identify consistent deviations. Option I, zero correction, is also a method to correct systematic errors, not random errors.
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: