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When is a vernier Callipers said to be free from zero error?
Draw a neat and labelled diagram of a vernier callipers. Name its main parts and state their functions.
The pitch of a screw gauge is 0.5 mm and the head scale is divided in 100 parts. What is the least count of a screw gauge?
State the correction if the positive error is 7 divisions when the least count is 0.01 cm.
Figure shows a screw gauge in which circular scale has 200 divisions. Calculate the least count and radius of the wire.
What do you understand by the term least count of screw?
How do you account for positive zero error for calculating the correct diameter of wires?
The following diagrams (Fig. 5) show the use of a vernier caliper under three different situations. Study the diagrams carefully and note down the vernier readings in each case.
(a) Measuring the diameter of the rod
(b) Measuring Internal diameter of a cavity
(c) Measuring depth of a cavity
