Tow full  turns  of  turns of the circular  scale  of a screw  gauge  cover a distance  of 1 mn  on
Channel: Doubtnut
Date: 14/06/2020

Tow full  turns  of  turns of the circular  scale  of a screw  gauge  cover a distance  of 1 mn  on its  its main scale . The  total number  of divisions  on the circular scale  is 50. Further m it is  found  that  the  screw  gauge  has a zero error  of - 0.02 mm . While  measureing  the  diameter  of a thin  wire , a student notes  the main  scale  reading  of 4 mm  and the  number  of  circular  scale  divisions  in line  with the main  scale  as 37. The  diameter  of  the wire  is