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1. Define least count of any device.
Least count is the measured in a given device by it.
2. What do you know about pitch of screw gauge?
Pitch of the screw gauge is the . It is measured by the ratio of distance travelled on the to the number of rotations of the .
3. Can you find the diameter of a thin wire of length \(2\ m\) using the ruler from your instrument box?
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