Question

how can the least count of a screw gauge be decreased

Answer 1

If we use a metre scale for measurement of length, it may have graduations at 1 mm division scale spacing or interval. A Vernier scale on caliper may have a least count of 0.2 mm while a micrometer may have aleast count of 0.01 mm. ... Instruments of higher precisioncan reduce the least count error.

Answer 2

Answer:

First of all least count of an instrument is the smallest measurement that can be taken accurately with it.

Explanation:

Ways to decrease the least count of a screw gauge:

1) Decreasing the pitch

2) Increasing the total number of division on the cricular scale.

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