The uncertainty in a measurement may occur due to_______________?
Correct answer: D. All given in A, B and C
- A. Limitation of an instrument
- B. Natural variation of the object to be measured
- C. Inadequate technique
- D. All given in A, B and C
Explanation
Uncertainty can result from the instrument’s finite resolution, natural changes in the measured object, or an imperfect measurement technique. Therefore all three sources contribute, while students may select only a because they associate uncertainty solely with least count.
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About Displacement and Velocity
Displacement is the directed change in position, while velocity is the rate of change of displacement and includes both magnitude and direction. The topic connects position-time and velocity-time graphs with average and instantaneous values, and distinguishes displacement from distance and velocity from speed.
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