NEET Physics Screw Gauge MCQ Question
Which of the following statements about the screw gauge is correct?
The screw gauge measures the diameter of a wire by taking readings from both the linear and circular scales.
Backlash error can be completely eliminated by adjusting the screw gauge properly.
The rachet mechanism is unnecessary when measuring hard materials like steel.
The pitch of the screw gauge is defined as the distance between two consecutive divisions on the linear scale.
Correct Answer
Detailed Explanation
The screw gauge measures the diameter of objects by recording readings from both the linear and circular scales, as described in the provided context. Backlash error can be minimized but not eliminated, and the rachet mechanism is crucial to avoid undue pressure which can distort measurements.
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