A student measured the diameter of a wire using a screw gauge with the least count $0.001\, cm$ and listed the measurements. The measured value should be recorded as
A$5.3200\,cm$
B$5.3\,cm$
C$5.32\,cm$
D$5.320\,cm$
AIEEE 2012, Medium
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D$5.320\,cm$
d The least count $(L.C.)$ of a screw guage is the smallest length which can be measured accurately with it.
As least count is $0.001\,cm = \frac{1}{{1000}}\,cm$
Hence measured value should be recorded upto $3$ decimal places i.e., $5.320\, cm$
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