Question

1.
Which of the following is the most precise
instrument for measuring the length?
(1) Metre rod of least count 1 mm
(2) Vernier callipers of least count 0.1 mm
(3) Screw gauge of least count 0.01 mm
(4) Screw gauge of least count 0.02 mm​

Answer 1

Answer:

screw gauge with least count of 0.01 millimetre