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Which of the following measures a small length to high accuracy : metre rule , vernier callipers or screw gauge?
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.
How can the least count of a screw gauge be decreased?
What is the need for measuring length with vernier callipers?
What do you understand by the following term as applied to micrometre screw gauge?
Thimble
What do you understand by the following term as applied to micrometre screw gauge?
Thimble scale
State whether the following statement is true or false by writing T/F against it.
The diameter of a wire can be measured more accurately by using vernier calipers than by a screw gauge.
