Mention the various sources of occurrence of errors while taking measurements.
Answers
Variation of temperature, humidity, gravity, wind, refraction, magnetic declination etc. are most common natural phenomena which may cause measurement errors. If they are not properly observed while taking measurements, the results will be incorrect.
Example: Length error of tape or chain due to temperature change.
Answer:An error may be defined as the difference between the measured value and the actual value. For example, if the two operators use the same device or instrument for finding the errors in measurement, it is not necessary that they may get similar results. There may be a difference between both measurements. The difference that occurs between both the measurements is referred to as an ERROR.
Sequentially, to understand the concept of errors in measurement, you should know the two terms that define the error. They are true value and the measured value. The true value is impossible to find out the truth of quantity by experimental means. It may be defined as the average value of an infinite number of measured values. Measured value can be defined as the estimated value of true value that can be found by taking several measured values during an experiment.
Explanation:1) Gross Errors
2) Blunders
3) Measurement Errors
Systematic Errors
Instrumental Errors
Environmental Errors
Observational Errors
Theoretical Errors