Fig. below shows the reading obtained while measuring the diameter of a wire with a screw gauge....

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Fig. below shows the reading obtained while measuring the diameter of a wire with a screw gauge. The screw advances by 1 division on 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.
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