Correct option is B
When a micrometer has a
negative error, it means that the micrometer is giving a
lower reading than the actual dimension of the object. To correct this, you need to
add the negative error to the actual reading. In simpler terms, if the micrometer consistently reads "too low," you compensate by increasing the value by the amount of the negative error.
Negative Error: Occurs when the micrometer shows a value lower than zero (like -0.02 mm) even when fully closed.
Positive Error: Occurs when the reading is above zero when the micrometer is closed.
Correction Formula: Correct Reading = Observed Reading + Negative Error
Calibration: Regular calibration of the micrometer is essential to avoid systematic errors.
