A micrometer is used to determine the diameter of a uniform wire. What action is taken to obtain an accurate answer?
- AMake the micrometer horizontal and then use the scales to find the reading.
- BSubtract the fixed-scale reading from the rotating-scale reading.
- CSubtract the rotating-scale reading from the fixed-scale reading.
- DUse the scales to find the reading and add or subtract any zero error.