The circular divisions of shown screw gauge are 50. It moves 0.5 mm on main scale in one rotation. The diameter of the ball is

Question

The circular divisions of shown screw gauge are 50. It moves 0.5 mm on main scale in one rotation. The diameter of the ball is (A) 2.25 mm (B) 2.20 mm (C) 1.20 mm (D) 1.25 mm

Tardigrade Admin · Accepted Answer

Zero error =5 × (0.5/50)=0.05 mm Actual measurement <img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/physics/c19922633314a3fd5959debe6cc6cd70-.png" /> =2 × 0.5 mm +25 × (0.5/50)-0.05 mm =1 mm +0.25 mm -0.05 mm =1.20 mm

Q. The circular divisions of shown screw gauge are $50$ . It moves $0.5 mm$ on main scale in one rotation. The diameter of the ball is

2.25 mm

2.20 mm

1.20 mm

1.25 mm

Zero error $= 5 \times \frac{0.5}{50} = 0.05 mm$
Actual measurement

$= 2 \times 0.5 mm + 25 \times \frac{0.5}{50} - 0.05 mm$
$= 1 mm + 0.25 mm - 0.05 mm = 1.20 mm$

Q. The circular divisions of shown screw gauge are 50. It moves 0.5mm on main scale in one rotation. The diameter of the ball is