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Name the part of the vernier callipers which is used to measure the following
Internal diameter of a mug
Name the part of the vernier callipers which is used to measure the following
Thickness of a pencil.
Draw a neat and labelled diagram of a screw gauge.
Name its main parts and state their functions.
Fig., below shows the reading obtained while measuring the diameter of a wire with a screw gauge. The screw advances by 1 division on the main scale when circular head is rotated once.
Find:
(i) Pitch of the screw gauge,
(ii) Least count of the screw gauge and
(iii) The diameter of the wire.
State the correction if the positive error is 7 divisions when the least count is 0.01 cm.
What do you understand by the term least count of screw?
What is the backlash error?
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
A Vernier calliper reads a main scale reading of 2.3 cm and the 5th division of the Vernier scale coincides with a main scale division. If the least count is 0.01 cm, what is the actual reading?
