Question

Which of the following is the most precise instrument for measuring length?

• A. Metre rod of least count 0.1 cm
• B. Vernier calipers of least count 0.01cm
• C. Screw gauge of least count 0.001 cm
• D. None of these

Answer 1

Answer: (C)

Screw gauge of least count 0.001 cm

Answer 2

Screw gauge has minimum least count of $0.001cm.$ Hence, it is most precise instrument.