7 A student measured the diameter of a small steel ball

Last updated: 6/10/2023

7 A student measured the diameter of a small steel ball using a screw gauge of least count 0 001 cm The main scale reading is 5 mm and zero of circular scale division coincides with 25 divisions above the reference level If screw gauge has a zero error of 0 004 cm the correct diameter of the ball is 1 0 521 cm 3 0 053 cm 2 0 525 cm 4 0 529 cm