Question

12. When a schew gauge of least count 0.01 mm
is used to measure the diameter of the wire, the reading on the sleeve is found to be 1 mm and the reading on the thimble is found to be 27 divisions. (i) What is the diameter of the wire in cm ?
(ii) the zero error is + 0.005 cm, what is the correct diameter ?​

Answer 1

Explanation:

of circular scale division = 1 mm / 100 = 0.01 mm. Hence the corrected reading is 4.78 mm. Example 04: When a screw gauge with a least count 0.01 mm is used to measure the diameter of a wire, the reading on the sleeve is found to be 0.5 mm and the reading on the thimble is found to be 27 divisions.