Discussion
True or false: adding more digits to a display improves the accuracy of a measurement.
Answer: A
Correct answer: False, since resolution and accuracy are different properties
Extra digits let the instrument discriminate finer changes, which is resolution. Whether those digits are correct is accuracy, and that depends on calibration. A five-digit meter that is 1 per cent out displays its error to five figures - the additional digits make the wrong answer more precise, not more right.
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