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Question

Which of the following measurements is most precise? (a) 4.00 mm (b) 4.00 cm (c) 4.00 m (d) 40.00 m


A

4.00 mm

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B

4.00 cm

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C

4.00 m

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D

40.00 m

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Solution

The correct option is A

4.00 mm


Precision:

  1. The closeness of a measured value to a standard or true value is referred to as accuracy.
  2. The degree to which repeated measurements under the same conditions are unchanged is referred to as precision.
  3. The measurement of 4.00 mm is precise because it was taken with a minimum least count instrument.

Hence, Option (A) is correct.


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