Which of the following length measurement is most accurate and why?(i) 4.00 cm, (ii) 0.004 mm and (iii) 40.00 cm
(i) ∆x /x = 0.01/4.00 = 0.0025
(ii) ∆x / x = 0.001/0.004 = 0.25
(iii) ∆x /x = 0.01/40.00 = 0.00025
The Last observation has the least fractional error and hence, it is more accurate.