RE-NEET2024Physics-Units and Measurements

RE-NEET 2024 Physics Screw Gauge MCQ Question

Type: MCQ-numerical-Medium-Class 11

The pitch of an error free screw gauge is 1 mm and there are 100 divisions on the circular scale. While measuring the diameter of a thick wire, the pitch scale reads 1 mm and 63rd63^{rd} division on the circular scale coincides with the reference line. The diameter of the wire is:

A

1.63 cm

B

0.163 cm

C

0.163 m

D

1.63 m

Correct Answer

Option B

Detailed Explanation

The diameter is calculated as (pitch scale reading) + (circular scale reading × least count). Here, it is 1 mm + 0.63 mm = 1.63 mm = 0.163 cm.

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