A student measured diameter of a wire using a screw gauge with least count 0.001, cm and listed meas

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1.Units, Dimensions and Measurement

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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)

Solution

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., $5.320\, cm$

Standard 11

Physics

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