when a screw gauge with a least count of 0.01 mm is used to measure the diameter of
a wire, the reading of the liner scale is 0.5 mm and reading
on the circular scale is 27 division.What is the diameter
in cm?
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Answer:
L.C. of screw gauge = 0.01 mm or 0.001 cm
Main scale reading = 0.5 mm
no. of division of circular head in line with the base line ( p) = 27
circular scale reading = (p) × L.C
= 27 × 0.001 cm
0.027 cm
diameter ( total reading ) = m.s.r. + circular scale reading
( 0.1 + 0.027 )
= 0.127 cm
hope it will help you....
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