JEE Advanced Model Paper 18 with solutions for online practice

A micrometer screw gauge with pitch of 0.5cm and 50 divisions on circular scale is usedto measure the diameter of a thin wire. Initially when the gap is closed the line of fourthdivision coincides with the reference line. Three reading shows 46th, 48th and 44thdivision coinciding with the reference line which is beyond 0.5 mm of the main scale.The (best) measured value is