Question

Which of following is most precise device for measuring length
(a)Vernier callipers with 20 division on the sliding scale
(b) Screw gouge of pitch 1 mm and 100 divisions on the circuler scale

Answer 1

Answer:

b screw gouge of pitch 1mm and 100, divisions on the circular scale

Answer 2

Explanation:

As compare to Vernier calipers, screw gauge is more precise because the least count of Vernier calipers is 0.1 mm and for screw gauge it is 0.01 mm. So, a screw gauge can measure more precisely than a Vernier caliper.