NEET Physics Screw Gauge MCQ Question
Consider a screw gauge setup where a wire is positioned between the screw and the stud. After rotating the rachet until a click sound is heard, how should you proceed to accurately measure the diameter of the wire?
Read the linear and circular scales, then measure diameter again after rotating the wire 90°.
Only read the linear scale, as it provides complete measurement.
Read the circular scale twice without rotating the wire for consistency.
Measure the diameter once and ignore any zero error corrections.
Correct Answer
Detailed Explanation
To accurately measure the wire's diameter, take readings at two perpendicular positions by rotating the wire 90°, as per the NCERT context.
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