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Distance travelled by linear scale of screw gauge during two full rotation of circular scale is 1mm and circular scale has 50 divisions. In an experiment to measure thickness of a plate, six divisions of main scale are clearly visible and 28^(th) division of circular scale coincides with reference line. Moreover when studs touch each other, zero of circular scale lies 4 division below the reference line, thickness of the plate will be: |
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Answer» <P>3.28 mm Device has+ve ZERO error `R=6p+28(p)/(50)-4(p)/(50)=6p+(24p)/(50),3mm+(24)/(50)xx0.5=3.24mm` |
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