NEET Physics Screw Gauge MCQ Question
A screw gauge is used to measure the diameter of a wire. Which precaution should be taken to ensure accurate measurement?
Use the ratchet arrangement to avoid undue pressure on the wire.
Rotate the screw both clockwise and counterclockwise to secure the wire.
Apply maximum pressure to ensure the wire is firmly held.
Ignore any zero error as it does not affect the final measurement.
Correct Answer
Detailed Explanation
Utilizing the ratchet arrangement helps avoid undue pressure on the wire, which may change the diameter, leading to inaccurate measurements.
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