NUMERIC RESPONSE
Two full turns of the circular scale of a screw gauge cover a distance of 1 mm on its main scale. The total number of divisions on the circular scale is 50. Further, it is found that the screw gauge has a zero error of 
. While measuring the diameter of a thin wire, a student notes the main scale reading of 3 mm and the number of circular scale divisions in line with the main scale as 35. The diameter of the wire is 
mm.
Text Solution
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NUMERIC RESPONSE
(3.38)
Pitch 
Reading 
[Main scale reading + circular scale reading × L.C] - (zero error)
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