Question:
Using screw gauge of pitch $0.1 \mathrm{~cm}$ and 50 divisions on its circular scale, the thickness of an object is measured. It should correctly be recorded as :
Correct Option: 1
Solution:
(1) Thickness $=$ M.S. Reading $+$ Circular Scale Reading (L.C.)
Here LC $=\frac{\text { Pitch }}{\text { Circular scale division }}=\frac{0.1}{50}=0.002 \mathrm{~cm}$ per
division
So, correct measurement is measurement of integral multiple of L.C.
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