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Grade 11General Physics

Which one of these is most accurate and which the most precise and alsoqlso why? ??
1: 40m
2: 0.040m
3: 0.04m
4: 0.4m

Profile image of Saloni
6 Years agoGrade 11
Answers icon

1 Answer

Profile image of Arun
6 Years ago
Length
(l)
 Least Count 
(Δl)
 Relative Error 
(Δl/l)
(i) 
 4.00 mm
0.01mm
  
2.5× 10-3
(ii) 
4.00 cm
0.01 cm
2.5×10−3
(iii) 
4.00 m
0.01 m
2.5×10−3
(iv) 
 40.00 m
0.01m
2.5×10−4
Since the relative error in the measurement of 40.00 m is minimum, so this measurement is most accurate. The measurement 4.00 mm is most precise because it is measured with an instrument of minimum least count.

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