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Define the least count of vernier callipers. How do you determine it?
Name the two scales of a vernier callipers and explain how it is used to measure length correct up to 0.01 cm.
Explain the terms : Least count of a screw gauge.
How are they determined?
Define metre according to the old definition.
(a) A vernier scale has 20 divisions. It slides over the main scale, whose pitch is 0.5 mm. If the number of divisions on the left hand of the zero of vernier on the main scale is 38 and the 18th vernier scale division coincides with the main scale, calculate the diameter of the sphere, held in the jaws of vernier callipers.
(b) If the vernier has a negative error of 0.04 cm, calculate the corrected radius of the sphere.
What do you understand by the following term as applied to screw gauge?
Zero error
How the backlash error is avoided?
What is the least count in the case of the following instrument?
Spring balance
Define the least count of an instrument.
