Of divisions on circular head
lin
L.C.
0-05 cm
50
: 0.001 cm
T
5. The pitch of a screw gauge is 1 mm and there
are 100 divisions on the circular head. While
measuring the diameter of a wire, the main scale
200 reads 3 mm and the 55th division is in line with
the base line. Find the diameter of the wire.
Assume that the screw gauge is free from zero
error
by
ga
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Answered by
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Answer:
ANSWER
L.C. of the screw gauge =
Numberofdivisionsoncircularscale
Pitch
=
100
1
=0.01mm
Given : Main scale reading =1 mm
Circular scale reading =0.01×47=0.47
∴ Diameter of wire = Total reading =1.47mm=0.147cm
Curved surface area = π×dl=π×(0.147)(5.6)=2.586≈
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