Q6. Screw gauge can give more precise length than vernier calipers. Briefly explain why?

Ans:
Screw gauges can give more precise lengths than vernier calipers because of the smaller least count of screw gauges.
Explanation:
The smaller the least count of an instrument, the more precise will be its reading. A typical screw gauge has a least count of 0.01 mm or 0.001 cm while a typical vernier caliper has a least count of 0.1 mm or 0.01 cm.

As the least count of screw gauges is about 10 times smaller than that of vernier calipers that’s why screw gauges can give about 10 times more precise reading of length than vernier calipers.

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