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Physics
Which of the following is the most precise instrument for measuring length?
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Q. Which of the following is the most precise instrument for measuring length?
Physical World, Units and Measurements
A
Metre rod of least count $0.1\, cm$
14%
B
Vernier callipers of least count $0.01 \,cm$
13%
C
Screw gauge of least count $0.001 \,cm$
59%
D
None of these
14%
Solution:
Screw gauge has minimum least count of $0.001\, cm$. Hence, it is most precise instrument.