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Explain the terms : Least count of a screw gauge.
How are they determined?
Why is the metre length in terms of the wavelength of light considered more accurate?
What do you understand by the following term as applied to screw gauge?
Positive zero error
How do you account for negative zero error, for calculating the correct diameter of wires?
In the following figure, the pitch of the screw is 1 mm. Calculate:
(i) the least count of screw gauge and
(ii) the reading represented in the figure.
What is the least count in the case of the following instrument?
Thermometer
Consider the following case where the zero of vernier scale and the zero of the main scale are clearly seen. If L.C. of the vernier calipers is 0.01 cm, write the zero error and zero correction of the following.
The main scale reading while measuring the thickness of a rubber ball using Vernier caliper is 7 cm and the Vernier scale coincidence is 6. Find the radius of the ball.
