Question

Least count of a micrometer screw gauge is usually:

• A. 0.1 mm
• B. 0.01 mm
• C. 0.001 mm
• D. 1 mm

Hint:

For most standard micrometers, the least count is typically 0.01 mm, which allows for fine measurements in manufacturing and mechanical work.

Answer 1

The Correct Option is B

The least count of a micrometer screw gauge is usually 0.01 mm. This refers to the smallest measurement that can be measured accurately with the instrument, which is typically 0.01 mm in precision.
- 0.1 mm is too large a least count for a typical micrometer.
- 0.001 mm is the least count of a more specialized, high-precision instrument, not a standard micrometer.
- 1 mm would be too large a least count for most micrometers used in engineering and manufacturing.
Thus, the correct answer is (2), 0.01 mm.