NEET UG 2021 · Physics · Question 23
NEET 2021 Physics, question 23
Question 23 of the NEET 2021 paper (code O1) is a Physics question from Units and Measurements. Its idea, Screw Gauge Measurements, was asked only this once in NEET 2017–2026. The NTA final answer key gives option 2.
Updated 2026-10-08
Q23 · Physics
A screw gauge gives the following readings when used to measure the diameter of a wire
Main scale reading : 0 mm
Circular scale reading : 52 divisions
Given that 1 mm on main scale corresponds to 100 divisions on the circular scale. The diameter of the wire from the above data is :
- 10.26 cm
- 20.052 cmOfficial answer
- 30.52 cm
- 40.026 cm
Official answer: option 2 · NTA final answer key
Same idea
The only question on Screw Gauge Measurements
No other NEET paper from 2017–2026 tested this exact idea.
Screw Gauge Measurements: every question and how it was framed
The chapter
Units and Measurements in ten years of NEET
20 questions from 2017–2026, asked in 10 of 10 papers, about 1.9 a paper. Units and Dimensions alone had 20.