Single Choice

A micrometer screw gauge has a negative error of $$7$$ divisions. While measuring the diameter of a wire, the reading on the main scale is $$2$$ divisions and $$78th$$ circular scale division, coincides with baseline. The number of divisions on the main scale per centimetre is $$10$$ and the circular scale has 100 divisions. Find the pitch of the screw.

A0.01 mm
Correct Answer
B0.01 cm
C0.1 cm
D0.001 mm

Solution

As the number of divisions on main scale are 10 to a centimeter, so the smallest division on main scale will be $$1 mm$$ and it will be the pitch (p) of the screw gauge. The number of circular divisions is $$n=100$$.
The least count of a screw gauge is $$L.C=p/n=1mm/100=0.01 mm$$

SIMILAR QUESTIONS

Measurement and Errors

A screw gauge has least count of $$0.01 mm$$ and there are $$50$$ divisions in its circular scale. The pitch of the screw gauge is :

Measurement and Errors

A screw gauge has 50 divisions on its head scale and the head scale moves 0.4 mm when rotated by four fifth of a rotation then find the pitch in mm.

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