General Physics Question 13
Question 13
- The circular scale of a screw gauge has 50 divisions and pitch of $0.5 \mathrm{~mm}$. Find the diameter of sphere. Main scale reading is 2 .
$(2006,3 \mathrm{M})$
(a) $1.2 \mathrm{~mm}$
(b) $1.25 \mathrm{~mm}$
(c) $2.20 \mathrm{~mm}$
(d) $2.25 \mathrm{~mm}$
Objective Questions II (One or more correct option)
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Answer:
Correct Answer: 13. (a)
Solution:
- Least count $(\mathrm{LC})=\frac{\text { Pitch }}{\text { Number of divisions }}$
$$ =\frac{0.5}{50}=0.01 \mathrm{~mm} $$
Now, diameter of ball
$$ =(2 \times 0.5 \mathrm{~mm})+(25-5)(0.01)=1.2 \mathrm{~mm} $$
