NEET UG 2018 · Physics · Question 37
NEET 2018 Physics, question 37
Question 37 of the NEET 2018 paper (code AA) is a Physics question from Units and Measurements. Its idea, Screw Gauge Reading and Zero Error, was asked only this once in NEET 2017–2026. The CBSE official answer key gives option 4.
Updated 2026-10-08
Q37 · Physics
A student measured the diameter of a small steel ball using a screw gauge of least count 0.001 cm. The main scale reading is 5 mm and zero of circular scale division coincides with 25 divisions above the reference level. If screw gauge has a zero error of – 0.004 cm, the correct diameter of the ball is
- 10.053 cm
- 20.525 cm
- 30.521 cm
- 40.529 cmOfficial answer
Official answer: option 4 · CBSE official answer key
Same idea
The only question on Screw Gauge Reading and Zero Error
No other NEET paper from 2017–2026 tested this exact idea.
Screw Gauge Reading and Zero Error: 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.