Which one of the following statements correctly relates the least count of an…

PHYSICS · Single correct · A Level · Physics · Measurements and their errors · Measurements and their errors

Problem

Which one of the following statements correctly relates the least count of an instrument to the percentage uncertainty in a single measurement? (a)

\displaystyle \text{Percentage uncertainty}= \dfrac{\text{least count}}{2\,\text{measured value}}\times 100\%

(b)

\displaystyle \text{Percentage uncertainty}= \dfrac{\text{least count}}{\text{measured value}}\times 100\%

(c)

\displaystyle \text{Percentage uncertainty}= \dfrac{\text{measured value}}{\text{least count}}\times 100\%

(d)

\displaystyle \text{Percentage uncertainty}= \dfrac{\text{least count}}{\text{measured value}}