Thickness of a metallic sheet is measured using a screw gauge and readings are 0.842 cm, 0.865 cm, 0.908 cm, 0.892 cm, 0.837 cm. Calculate the mean value, mean absolute error, relative error and percentage error.
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Answer:
2.57mm
Explanation:
Main scale reading M.S.R.=2 mm
Coinciding division n=57
Least count of screw gauge L.C.=0.01 mm
Thickness of wire t=M.S.R.+n×L.C.=2+57×0.01=2.57 mm
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