There are 100 divisions on the circular scale of a screw gauge of pitch 1 mm. With no measuring quantity in between the jaws, the zero of the circular scale lies 5 divisions below the reference line. The diameter of a wire is then measured using this screw gauge. It is found the 4 linear scale divisions are clearly visible while 60 divisions on circular scale coincide with the reference line. The diameter of the wire is :
- (A)4.65 mm
- (B)4.55 mm✓ Correct
- (C)4.60 mm
- (D)3.35 mm
Answer: (B)
Solution
Least count mm.
Raw reading mm.
With the circular zero sitting 5 divisions below the reference line, the zero-error correction is mm, giving
Raw reading mm.
With the circular zero sitting 5 divisions below the reference line, the zero-error correction is mm, giving
JEE Main · 2024 · 08 Apr 2024 · Shift 2 · Single correct option