NEET Physics Screw Gauge MCQ Question
Which of the following statements about the use of a screw gauge is correct?
The least count of a screw gauge is generally lower than that of a Vernier caliper.
Zero error must be calculated to determine the actual measurement.
The screw gauge can measure thickness with an accuracy of up to 0.1 mm.
The rachet arrangement is not necessary for accurate measurements.
Correct Answer
Detailed Explanation
Zero error must be corrected to find the actual thickness, as indicated in the procedure for measuring thickness of a sheet. The least count of a screw gauge is indeed more precise than that of a Vernier caliper, and the rachet arrangement is essential to avoid undue pressure during measurement.
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