In a screw gauge there are 100 divisions in circular scale

Last updated: 6/10/2023

In a screw gauge there are 100 divisions in circular scale and each main scale division is of 1 mm When there is no gap between the jaws 97th division coincides with the main scale zero and zero of main scale is not visible While measuring the diameter of a ball the circular scale is between 3 mm mark and 4 mm mark such that the 76th division of circular scale coincides with the reference line Select the correct alternative A the least count of the micrometer is 0 01 cm B the zero error is 0 04 mm C the diameter of the ball is 3 79 mm D the main scale reading is 4 mm