The pitch of a screw gauge is 1 mm and there are 100 divisions on the circular scale. In measuring t

Question

The pitch of a screw gauge is 1 mm and there are 100 divisions on the circular scale. In measuring the diameter of a sphere there are six divisions on the linear scale and forty divisions on circular scale coincides with the reference line. The diameter of the sphere is\

Professor PC Thomas Classes · Answer

(c) : L.C. $=\frac{1}{100}=0.01 \mathrm{~mm}$ Linear scale reading $=6($ pitch $)=6 \mathrm{~mm}$ Circular scale reading $=40 	imes 0.01=0.4 \mathrm{~mm}$ $	herefore \quad$ Total reading $=(6+0.4)=6.4 \mathrm{~mm}$